Table of Contents

1. Why Night Work and Rain Break Bags That Pass a Showroom Inspection

2. What a Rainy-Market Buyer Actually Asks For

3. The Zipper Decision: Why "Waterproof Zipper" Is Not a Specification

4. Tarpaulin or 1680D? Choosing the Shell for the Climate You Ship Into

5. Visibility From a Distance: Print Method Beats Extra Reflective Tape

6. Extended and Folding Structures: One Bag for a Shift, Flat Storage After It

7. Designing for Riders Who See the Bag for the First Time Today

8. Interiors, Moisture and Shared Fleet Bags

9. Repeat Orders, Spare Parts and the Economics of a 180-Day Warranty

10. A Pre-Sampling Specification Sheet You Can Send a Supplier

11. Why Fleets and Brands Work With Herisen

01. Why Night Work and Rain Break Bags That Pass a Showroom Inspection

A bag inspected under showroom lighting is being evaluated under the easiest conditions it will ever face.

On a night shift the conditions invert. The rider is opening the bag in poor light, often wearing gloves, sometimes in rain, frequently while the bag is resting on wet pavement or a scooter rack. The bag may be opened four or five times across a single shift. Water arrives not only from above but from the road — spray thrown up from tyres carries grit and oil, and it attacks the base and the lower side panels continuously rather than occasionally.

Three consequences follow, and each one is a specification decision rather than a manufacturing one.

Closure operation. A zip that is fine with bare hands becomes a two-minute problem with gloves in the dark. Pull size, pull position and how the flap covers the opening all matter more than the fabric.

Water entry at the opening. Rain rarely defeats a bag through the body fabric. It runs down the top and enters through the opening, which is why the closure and the flap geometry deserve more attention than the shell material.

Moisture retention. Once water is inside or the insulation layer is saturated, the bag stays heavy and the interior stays damp. That is a cleaning and drying problem, and it compounds across a shared fleet.

There is one more factor that shapes everything below. On platform work, the rider and the equipment are frequently not under the same roof. Whether a fleet is serving Uber Eats, Wolt, DoorDash or Glovo, bags are handed between riders, stored at hubs, and used by people who joined last week. Equipment that depends on careful handling will not get it. It has to be designed for the least experienced person on the busiest shift.

02. What a Rainy-Market Buyer Actually Asks For

The clearest lesson we have on rainy-route specifications came from a fleet buyer in Poland who approached us for custom bags.

They asked for samples and referenced the Glovo style specifically, and they explained why: they had heard this style performs well in rain and bad weather. Their requirements, repeated across several messages, were consistent — they needed genuinely strong material for rain and all weathers, a really strong bag for different weather, and a strong zip.

We quoted two reference directions, an Uber Eats style and a Glovo style, and recommended the Glovo direction for their market. But we also did something that changed the project: we asked the buyer to photograph the Glovo bags currently in use on the streets of their own city and send us the images.

That request was not administrative. "Glovo style", like any platform style, is not a fixed engineering specification. The bags a platform's riders carry vary by country, by vehicle type, by local supplier and by year. A supplier working from a generic reference will produce something that satisfies the name and not the function. The photographs told us which opening configuration, which divider layout and which proportions their riders were actually working with.

The practical result is a rule we now apply to every platform-referenced enquiry: treat the platform name as the start of the conversation, not the end of it. Tell us which platform the bags will be used on, then tell us the packaging sizes, the vehicle, the route length, the climate and whether the bag will be shared. Uber Eats and Wolt riders on e-bikes in a dense city need different proportions from Glovo or DoorDash fleets running scooters over longer suburban routes. The brand word gets a buyer to the right category. The operating detail decides the product.

03. The Zipper Decision: Why "Waterproof Zipper" Is Not a Specification

If one component decides whether a bag survives a rainy season, it is the zip.

Our Polish project makes the point well. The sample was built with branded SBS waterproof zippers. When we quoted, we also offered a standard waterproof zipper at a lower price and were explicit that the standard option is also good quality. The buyer asked repeatedly which zip the sample had used and locked the specification to SBS. They had already learned, presumably from experience, that "waterproof zipper" describes a broad range rather than a standard.

For buyers writing a specification, the term needs to be broken into parts:

• Brand or supplier of the zip — a named zip brand is a checkable specification; "waterproof zipper" is not.

• Tooth type and size — a larger tooth profile resists distortion better under load, which matters on a bag that gets overfilled during peak.

• Coverage — whether a flap or hood covers the zip. A covered opening is a design decision with a larger effect on rain performance than the zip itself.

• Pull accessibility — pull size and shape, so the bag opens with gloves on, in low light.

• Opening geometry — top-opening versus three-sided access changes both how fast a rider can load, and where water can enter.

• Length — related to the opening, and to how much of the interior is exposed each time the bag is opened on a multi-stop route.

A cheaper zip on a well-covered opening will outperform an expensive zip under an unprotected flap. Specification is the geometry plus the component, not the component alone.

04. Tarpaulin or 1680D? Choosing the Shell for the Climate You Ship Into

The two shells that dominate our delivery bag range are tarpaulin and 1680D polyester, and buyers often treat the choice as a quality ranking. It is not. It is a fit question.

Representative models from our current range:

• HL-CLB408 — tarpaulin, 10 mm PE foam, PP board, aluminium, 52 × 52 × 48 cm

• HL-CLB401 — 1680D, 10 mm PE foam, PP board, aluminium, 40 × 40 × 55 cm

• HL-CLB416 — tarpaulin, 8 mm PE foam, PP board, aluminium, 46 × 46 × 35 cm

• HL-CLB417 — tarpaulin, 15 mm sponge foam, PP board, aluminium, 43 × 43.5 × 47 cm

• HL-CLB515 — 1680D, 20 mm PE foam, PP board, aluminium, 39 × 39 × 46 cm

• HL-CLB415 — 600D, 20 mm PE foam, aluminium, T-shape divider, 33 × 31 × 34 cm

Both shells sit over the same insulation architecture — PE foam for the thermal layer, a PP board for structure, an aluminium layer for reflection. The difference is the surface.

Tarpaulin presents a smooth, continuous face. Road spray and dirt wipe off it, and it does not hold water in the weave. For markets where rain is frequent and the bag will be cleaned with a cloth between shifts, it is usually the more practical choice, and it is the reason tarpaulin accounts for the majority of the models in our range.

1680D is a woven fabric. It offers a different hand and strong abrasion and tear resistance, and it takes certain print and branding treatments differently from a coated surface. For urban fleets where the bag spends more time being loaded and unloaded than being hosed down, it performs well.

The decision should follow from four questions, in this order: how often does it rain where the fleet operates; how will the bag actually be cleaned; what artwork has to print on the shell; and what vehicle will carry it. A buyer ordering for a Mediterranean market and a buyer ordering for Northern Europe should not receive the same recommendation, even if their order quantities and dimensions match.

05. Visibility From a Distance: Print Method Beats Extra Reflective Tape

Night visibility is usually discussed as a materials question — how much reflective tape, and where. Our experience is that the larger variable is the print method.

Our Polish buyer raised this directly. After receiving the first batch they reported that the colours were not as strong as they should be, that the white, orange and blue were weak, and that the colours on the black bag were the weakest of all. Then they stated the actual requirement plainly: they wanted to be visible from a long distance.

The cause was a production detail. Digital printing on dark fabric without a white underbase produces weak, muted colour, because the ink is laid onto black. The fix was a process change rather than a design change: screen printing with a white underbase, so colour sits on white instead of on black. We committed to the white underbase for bulk production, produced a physical sample to prove the improvement, and sent photographs of the result.

A second issue appeared in the same batch. The webbing on the shoulder straps read brown rather than orange. The explanation was that the sample used market-stock webbing as a reference only. For bulk production the webbing is made to a specified colour reference, so the strap matches the body panel instead of approximating it.

Two conclusions for anyone specifying a fleet bag:

If the bag is dark and the branding must read at distance, the print method is part of the specification. Ask a supplier what happens beneath the colour. For a black bag with a multi-colour logo, the difference between a white underbase and no underbase is the difference between a bag that reads at twenty metres and one that reads at two.

Colour reference should be agreed for every visible component, including webbing, binding, zip tape and thread — not just the main printed panel. Small components are where colour drift happens, and they are the first thing a rider notices.

Reflective material still has a role, and it is a complementary one. Reflective elements work when a light source is pointed at them. Print colour works when it is not. A fleet operating after dark benefits from both, arranged so that the reflective layout does not compete with or obscure the branding.

06. Extended and Folding Structures: One Bag for a Shift, Flat Storage After It

Fleet demand is not flat. Lunch and dinner peaks use the full inventory; late-night and mid-week periods use a fraction of it. The bags that are not in use still have to be stored somewhere, and in a small rider station or a restaurant back room, empty rigid bags consume exactly as much space as full ones.

Semi-rigid construction with a folding element addresses this directly. Two models in our range illustrate the geometry:

• HL-CLB404 — tarpaulin, 10 mm PE foam, PP board, aluminium, extended 44 × 44 × 50 cm, folded 44 × 24 × 50 cm

• HL-CLB407 — tarpaulin, 10 mm PE foam, PP board, aluminium, extended 44 × 44 × 50 cm, folded 44 × 24 × 50 cm

The bag holds its shape while loaded, because the PP board carries the structure. Released, the side walls collapse and the profile drops from 44 cm to 24 cm. That is roughly a 45 percent reduction in footprint, which is the difference between a stack of spare bags fitting on a shelf and a stack of spare bags living on the floor.

The operational value shows up in four places: shift changeovers, when spare bags need to be stored rather than parked in a walkway; hub returns, when empty bags travel back with less wasted volume; damaged-unit separation, because a collapsed bag can be set aside for inspection without occupying a loading bay; and, for importers and distributors, carton and container packing efficiency, since more units fit per carton when the structure can be flattened.

Folding is not a free feature. Every fold line is a stress point, and on a waterproof bag the fold lines are where water resistance degrades first. If a folding structure is specified for a rainy market, the reinforcement at the fold edges and corners needs to be part of the specification from the start, not discovered in the second season.

We are also explicit about the limit of the approach. The objective is a bag that works properly when open and is easier to handle when empty. A structure that folds elegantly but will not stand upright while a rider loads food has solved the wrong problem. Across the range — from the compact HL-CLB415 at 33 × 31 × 34 cm to the large HL-CLB408 at 52 × 52 × 48 cm — the test we apply is whether the bag remains loadable one-handed on a wet pavement.

07. Designing for Riders Who See the Bag for the First Time Today

Rider churn is the quiet cost in delivery equipment, and it is structural rather than exceptional. Riders join, leave, return seasonally, and are frequently subcontracted. A fleet that has trained its equipment carefully in January may be running mostly-untrained riders by July.

The design implication is that the bag has to be self-explanatory. A rider arriving at a busy pickup counter during peak has seconds, not minutes. If the opening is ambiguous, if the divider system requires interpretation, if the strap adjustment is not obvious, the bag will be used incorrectly — food loaded on the wrong side, the divider left out, the top not fully closed.

Four design choices carry most of the weight:

A consistent opening. Deciding between top-loading and front-access and then applying that decision across every bag in the fleet. When all branches use the same configuration, a supervisor explains one system rather than a museum of purchases made over several years.

A visible divider logic. Dividers that are physically obvious and easy to reposition. Our HL-CLB415 uses a T-shape divider, which creates an intuitive two-zone layout without any instruction — useful when the separation between hot and cold, or between two customer orders, has to be understood instantly.

Obvious external features. Label pockets and card holders positioned where a rider naturally reaches, so the order document has one predictable home across the fleet.

Oversized, glove-friendly hardware. Zip pulls and strap adjusters sized for cold, wet hands. This is the same decision discussed in section 03, seen from the rider's side rather than the buyer's.

The commercial case for consistency is straightforward. One specification across a fleet makes training reproducible, makes replacement straightforward — a new bag does not require new instructions — and makes supervision possible at a glance. For a fleet working across Uber Eats, Wolt, DoorDash or Glovo, where a rider may handle different platforms on different days, equipment that explains itself is worth more than equipment that performs marginally better on a specification sheet.

08. Interiors, Moisture and Shared Fleet Bags

A delivery bag may carry breakfast, lunch, dinner and a late-night order in the same day. Between trips, condensation collects in the lining, sauce escapes, drinks leak, and the outer shell comes back wet from the road. On a shared fleet bag, no single rider owns the cleaning problem, which is a reliable method for ensuring it is not solved.

The interior specification should therefore be written for cleaning speed, not for appearance.

Liner material. A surface that can be wiped, rather than one that absorbs. Our range uses PE foam insulation with aluminium and PEVA-type liners depending on the model, and the liner choice should follow from what the bag carries — a pizza operator needs grease resistance, a beverage operator needs liquid containment, a dessert brand needs a smooth surface that protects delicate packaging.

Removable components. Base boards and dividers that lift out can be cleaned, dried and replaced individually. This is the single most useful feature for a shared fleet, because the components that get dirtiest are the ones that are cheapest to replace.

Internal geometry. Rounded or simplified internal corners reduce the places where liquid and residue collect and where a cloth cannot reach.

Drying. A bag that stays sealed and wet between shifts will develop odour regardless of the liner. Ventilation — and the ability to open the bag flat for drying — belongs in the specification alongside the waterproofing.

The connection to rainy-route performance is direct. Water resistance keeps rain out; cleaning and drying keep moisture from accumulating inside. A bag with excellent waterproofing and no drying plan still ends up damp, heavy, and unpleasant by the end of a wet week.

09. Repeat Orders, Spare Parts and the Economics of a 180-Day Warranty

For a fleet, the first order is a pilot and the second order is the real purchase. The economics of the second order depend almost entirely on how much of the first order's work can be reused.

That is why we track a project's reusable assets explicitly. The Polish project ended with a verified black and multi-colour logo scheme, a confirmed screen printing with white underbase process, a confirmed SBS waterproof zipper specification, Pantone-referenced custom webbing, three print design files, and a working DDP door-to-door duty-paid route covering two delivery addresses. None of that has to be re-established on a reorder, which means the second order is faster, cheaper and — more importantly — repeatable. The colour on bag five hundred matches the colour on bag one.

Our standard commercial parameters for delivery bag projects:

• Average warranty: 180 days

• Minimum order quantity: 300 pieces, with a minimum lead time of 30 days at MOQ

• Average lead time: 55 days

• Shortest sample time: 5 days

• Around 20 new delivery bag styles introduced per year

Two honest notes belong in this section.

First, a warranty is only meaningful if the failure modes are understood. A 180-day warranty on a bag used by a single careful rider and a 180-day warranty on a bag shared across three shifts are not the same commitment. Buyers should describe the usage pattern — how many riders, how many shifts, how the bag is stored — because that is what allows the construction to be matched to the expected service life rather than to a price point.

Second, the Polish project's own review identified a genuine gap: the requirements were agreed through conversation and samples, but no written specification sheet was ever signed off. The buyer's needs were met, and the risk was unnecessary. That gap is the reason for the next section.

10. A Pre-Sampling Specification Sheet You Can Send a Supplier

A specification sheet is not bureaucracy. It is the document that prevents a well-intentioned sample from becoming a thousand well-intentioned mistakes.

The fields that matter most for night and rainy-route equipment:

• Platform and market. Which platforms the fleet serves and in which country. This determines local expectations, not just brand styling.

• Operating climate and seasonality. How many months of the year the fleet works in rain.

• Vehicle type. E-bike, scooter, motorcycle or car. This drives proportions, mounting method and base reinforcement.

• Route profile. Typical route duration, number of stops, and whether the bag is opened repeatedly per shift.

• Food and packaging dimensions. The actual boxes and bags that go in, not approximate sizes.

• Load weight. Especially for overfilled peak orders.

• Shell material. Tarpaulin or 1680D, with the cleaning method stated, since the two choices follow from each other.

• Zip specification. Brand, tooth profile, opening geometry, and whether a flap covers the opening.

• Colour references. Specified for every visible component — main panel, webbing, binding, zip tape.

• Print method, and whether a white underbase is required. State this explicitly for dark bags.

• Visibility requirements for night operation, including whether print colour alone must read at distance.

• Folding requirement, and whether the bag must stand upright while being loaded.

• Internal configuration. Dividers, base boards, label pockets, and which components must be removable.

• Usage pattern. Riders per bag, shifts per day, storage conditions.

• Order plan. First order quantity and expected annual volume, so the specification is built for a repeat programme rather than a one-off.

A supplier working from this list can quote a specific product. A supplier working from a photograph can only guess. Clear operating detail is what turns a style name into a buildable specification.

11. Why Fleets and Brands Work With Herisen

Xiamen Herisen Commercial Co., Ltd. was established in 2017, with our manufacturing base in the bags industry since 2005. We design, develop, produce and control quality for food delivery bags, logistics bags and outdoor bags, and we hold ISO9001 certification, with products complying with REACH and CPSIA requirements.

Our delivery bag output is substantial and steady: monthly production capacity exceeds 50,000 pieces, and over the past twelve months we shipped 520,000 delivery bags along with 340,000 cooler bags and 250,000 outdoor bags. We operate our own factory supported by equity-sharing partnerships with sister factories, which is what allows both volume and schedule control on fleet-scale orders. We serve brand businesses, retailers, wholesalers, importers and manufacturers, with Western Europe representing 65 percent of our market, North America 18 percent and Northern Europe 17 percent.

Our OEM and ODM portfolio includes programmes for international brands and retail groups including Uber, Wolt, LALAMOVE, Zoomo, inDrive, Walmart and Coop. We ship from Xiamen Port under FOB, CIF, EXW, DDP and CNF terms.

What we would emphasise for fleets specifying night and rainy-route equipment is not the capacity figure but the working method: we quote multiple reference directions rather than one, we ask for photographs of the equipment your riders are actually using, we flag production details such as white underbase and webbing colour references before they become a batch problem, and we maintain the reusable assets that make your second order cheaper than your first.

FAQ

Q: Can Herisen customise food delivery bags for night delivery and rainy routes?

A: Yes. Shell material, zip specification, opening geometry, flap coverage, print method, colour references and internal configuration can all be specified for the operating conditions. Tell us the market, the climate and the vehicle, and we will quote the materials we would recommend rather than a single option.

Q: Should a rainy-market fleet choose tarpaulin or 1680D polyester?

A: It depends on how the bag is cleaned and how often it rains. Tarpaulin presents a smooth surface that wipes clean and does not hold water in the weave, which suits frequent rain and cloth cleaning. 1680D is a woven fabric with strong abrasion and tear resistance. Both are built over the same PE foam, PP board and aluminium insulation architecture.

Q: Why did colours look weak on a black delivery bag?

A: Digital printing applied directly onto dark fabric without a white underbase produces muted colour, because the ink sits on black. Screen printing with a white underbase places colour on white and restores the intended strength, which matters when the branding has to be legible at a distance at night.

Q: What does "SBS waterproof zipper" change compared with a standard waterproof zipper?

A: It is a named, checkable component specification rather than a general description. Waterproof zippers vary in tooth profile, tape, coating and durability. We quote both a branded option and a standard waterproof option and state which one the sample uses, so the choice is explicit.

Q: Can delivery bags be foldable and still be waterproof?

A: Yes, with attention to the fold lines. A semi-rigid structure such as HL-CLB404 folds from an extended 44 × 44 × 50 cm to 44 × 24 × 50 cm using a PP board and released side walls. Because fold edges and corners are the points where water resistance degrades first, reinforcement there should be written into the specification from the beginning.

Q: What is the minimum order quantity, lead time and warranty?

A: MOQ is 300 pieces, with a minimum lead time of 30 days at MOQ. Average lead time is 55 days, the shortest sample time is 5 days, and the average warranty is 180 days. We introduce around 20 new delivery bag styles each year.

Q: Do you support OEM and ODM for restaurant chains and delivery fleets?

A: Yes. OEM production follows confirmed drawings, samples or specifications. ODM development starts from the operating problem — climate, vehicle, route profile, packaging dimensions and load — and turns it into a sample, with adjustments made before mass production rather than after.