Roll-Top Cooler Backpack – Welded TPU Dry Bag Shell with Insulated Cooler Compartment, SL-I272

Roll-top welded TPU backpack with a built-in insulated cooler compartment and food-grade TPU liner. 30 × 21.5 × 47.5 cm, about 16 L, 1.4 kg. MOQ 300.

At a Glance

Product Description

SL-I272 is a roll-top cooler backpack measuring 30 × 21.5 × 47.5 cm (11.8 × 8.5 × 18.7 in) with the top rolled, weighing about 1.4 kg. The outer shell is sky blue TPU-laminated nylon with high-frequency welded seams, built like a dry bag: the top collar rolls down on itself and closes with a side-release buckle. Inside, an insulated cooler compartment of about 27 × 18.5 × 33 cm holds around 16 litres, or about 16 standard 330 ml cans without ice. It has 15 mm closed-cell foam walls and base and a food-grade TPU liner. A black webbing grab handle sits on a welded patch on the side, and a black slip pocket with a welded frame on the lower side holds a phone, keys or a bottle opener. The harness has padded shoulder straps, an adjustable sternum strap and lower adjusters, with a padded, channelled back panel. A black wear band protects the base.

Dry Bag Closure on a Cooler

Most backpack coolers close with a zipper across the top, and zippers are the first thing to fail on the beach: sand clogs the teeth, salt dries in them, and the slider stops sealing. SL-I272 uses the closure that dry bags have used for decades instead. The collar rolls down three times and buckles, so there are no teeth to clog, nothing to lubricate and nothing to break. The rolled collar also sits above the insulated compartment as an extra layer of trapped air, which slows heat getting in through the top, the part of any cooler that warms fastest.

Construction and Water Behaviour

The outer shell is high-frequency welded, so there are no stitch holes in the body. The grab handle, pocket frame and harness anchors are mounted on welded patches rather than stitched through the wall. The harness and back panel are sewn, which is how they get their padded, contoured shape.

Cold Holding

Packed with ice, rolled closed and kept out of direct sun, the cooler holds ice for approximately 36 hours in our trials at 25 °C ambient. Rolling the collar down tight against the contents reduces the air space above the ice and adds the rolled layer as top insulation. Results change with ambient temperature, sun exposure, how often it is opened and whether the contents were chilled before loading.

Carrying

A full cooler with ice weighs around 10–12 kg. The padded shoulder straps and back panel spread that load, the channels in the back panel let air move between the pack and your back, and the sternum strap keeps the straps in place on uneven ground. The side grab handle is for lifting the cooler out of a car boot or off a boat, where reaching for shoulder straps is awkward.

Engineering Specifications

Material Specifications

Functional Specifications

Customization and OEM

Packaging Specifications

Recommended Use

• Beach days
• Kayaking and SUP
• Boat trips
• Day hikes
• Festivals
• Picnics

Built for sandy, salty and wet days where zippers struggle. Suitable for drinks, food and ice. Not intended for submersion.

Quality Inspection Standards

Every production run is checked at IQC, IPQC and OQC. The suite covers load testing to 1,500 cycles on the harness and grab handle, tensile and bonding strength on welded seams and anchor patches, seam strength and bar-tack pull tests on the sewn harness, buckle pull and release testing, abrasion on the base, colour fastness and colour difference against the approved sample, and heavy rain and water-jet testing on finished coolers. Third-party inspection by SGS or QIMA can be arranged at the buyer's cost.

Product Highlights

Dry bag roll-top closure on a backpack cooler, with no zipper to clog or fail. Welded TPU shell with an insulated cooler compartment and food-grade TPU liner, IPX6, leakproof upright. About 16 L, holding around 16 cans. Rolled collar adds an air layer over the ice, for about 36 hours of ice under stated conditions. Padded straps, sternum strap, channelled back panel, side grab handle and side pocket. MOQ 300 with custom colours.

Printing and Logo

The front panel is flat and clear of webbing, giving a full area for a logo or artwork. Screen printing suits solid one- to three-colour marks and resists UV and salt. Heat transfer and UV digital printing handle multi-colour and photographic artwork. Welded TPU patches and raised silicone prints give a tonal, textured mark. Logos are placed below the roll-top fold zone so they do not crease. Artwork is required as vector files; a digital placement proof is returned before sampling.

OEM / ODM Capability

Sealock has manufactured insulated and waterproof gear for over 20 years, with factories in Guangdong, China and Ho Chi Minh City, Vietnam — the second site giving brands a non-China origin option where tariff exposure matters. We hold ISO 9001, BSCI, SMETA, Higg, GRS and SCAN certification, and produce insulated products for brands including STANLEY, Hydro Flask and CORDOVA.

This cooler combines our dry bag and cooler production: the roll-top shell is high-frequency welded like our dry bags, while the harness and back panel are sewn, and sewn construction is an equally mature in-house capability rather than an outsourced step. Most demanding requirements can be met, from a colour and logo change to a hip belt, thicker insulation, new sizes or full custom development; complex development with new tooling adds time to the first sample cycle, which is worth planning for early.

Related Products

• Roll-Top Soft Cooler 20L – Welded 840D TPU
• Barrel Cooler Backpack 18L – Flip Lid, Waist Strap
• Backpack Cooler 22L – Airtight Zip, Hip Belt
• Cooler Backpack with Removable Insert – 2-in-1
• Custom Backpack Cooler – OEM & Private Label

FAQ