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China leakproof cooler bag Manufacturer, Supplier, Factory

We insist on offering high-quality output with superior small business concept, honest profits along with the best and fast service. it will bring you not only the top quality product and huge profit, but one of the most significant will be to occupy the endless market for leakproof cooler bag, waterproof soft cooler, TPU soft cooler tote, insulated fishing cooler, marine soft cooler, We often hold the philosophy of win-win, and establish long-term cooperation connection with consumers from around the planet.We think that our expansion base on customer's achievement, credit rating is our daily life.
leakproof cooler bag, We've got been perfectly devoted to the design, R&D, manufacture, sale and service of hair products during 10 years of development. We now have introduced and are making full use of internationally advanced technology and equipment, with advantages of skilled workers. "Dedicated to providing reliable customer service" is our aim. We've been sincerely looking forward to establishing business relationships with friends from at home and abroad.

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  • Insulated Soft Travel Lunch Bag

    Insulated Soft Travel Lunch Bag

    For over 20 years, Sealock Outdoor Group has been dedicated to the research and production of high-performance Insulated Soft Travel Lunch Bag products. We have maintained long-term cooperation with international brands such as Stanley, Osprey, Musto, Simms, Hydro Flask, etc., and have won the trust of our customers with solid craftsmanship.
    We have three fully equipped high-frequency welding factories. The sample development and main fabric procurement are completed domestically, and customers can freely choose factories in China or Vietnam for mass production. Both factories in these places are proficient in producing fully welded bags and sewn bags. It is worth mentioning that choosing a Vietnamese factory can also help European and American customers save a lot of tariffs.
  • Leakproof Cooler Soft Bag

    Leakproof Cooler Soft Bag

    SEALOCK COOLER is a manufacturer from Guangdong, China. For the past 20 years, we have been focusing on the research and development of Leakproof Cooler Soft Bag, gradually establishing a complete product system. We have factories in both Vietnam and China. In the production process, we strictly follow international standards and have passed multiple authoritative certifications such as SMETA 4P, HIGG, SCAN, GRS, BSCI, and ISO9001. These certificates not only represent our achievements in quality management, but also provide quality assurance for every customer.
  • Soft Insulated Cooler Backpack

    Soft Insulated Cooler Backpack

    For over two decades, SEALOCK COOLER has been dedicated to designing and manufacturing soft insulated cooler backpacks. We are a professional manufacturer and supplier in China, with long-term partnerships with numerous international brands, including Stanley, Osprey, Must, Simms, and Hydro Flask.
    We have three high-frequency welding factories and supporting office facilities. We complete sample development and major fabric procurement in China, while providing customers with bulk production options from factories in China or Vietnam. Both factories can produce fully welded bags and sewn bags, and the Vietnamese factory can also help European and American customers save additional tariffs.
  • 28L Airtight-Zipper Insulated Backpack Cooler for Fishing and Camping

    28L Airtight-Zipper Insulated Backpack Cooler for Fishing and Camping

    Sealock supplies the 28L Airtight-Zipper Insulated Backpack Cooler for Fishing and Camping, a 28L soft cooler backpack in 840D TPU laminated fabric with an airtight waterproof zipper, a food-grade TPU liner and high-frequency welded seams. It holds ice up to 48 hours, carries on an ergonomic harness, and adds a modular bungee-and-pocket attachment system. OEM/ODM and full custom from MOQ 300, FOB Guangdong.
  • Cooler Backpack Insulated Leakproof

    Cooler Backpack Insulated Leakproof

    SEALOCK COOLER has specialized in manufacturing Cooler Backpack Insulated Leakproof for over 20 years, with production bases covering 20,000㎡ in China and Vietnam and over 1,000 employees. Our products are sold in 80+ countries, serving 3,000+ customers and maintaining long-term partnerships with many distributors. As a leading picnic cooler bag manufacturer in China, SEALOCK COOLER follows strict factory inspection standards to ensure consistent product quality.
  • Portable Lunch Cooler

    Portable Lunch Cooler

    SEALOCK COOLER focuses on the research and manufacturing of Portable Lunch Coolers. Our factories in China and Vietnam have established comprehensive quality control systems and hold six international certifications, including SMETA, HIGG, and SCAN. We firmly believe that high-quality products are the foundation of cooperation, and honest management is the cornerstone of long-term development. We look forward to working with you and becoming your most reliable supply chain partner in the Chinese market.
  • Related Blog
  • Reviews

  • Boating Cooler Backpacks: Dry Storage That Doubles as a Cooler

    Space on a boat is finite, and every bag you bring aboard has to justify the deck it occupies. That is the appeal of a cooler backpack that also works as dry storage: one bag instead of two, carrying the food and drinks cold while keeping phones, keys, wallets and dry clothes safe from spray. It is a genuinely good idea — but only if the bag is built to do both jobs in separate compartments, because a cold chamber and dry storage are thermally incompatible in the same space. This guide explains why, and what a real dual-purpose boating bag needs. Sealock (YiFuLong Outdoor Gear Co., Ltd.) builds welded cooler backpacks with sealed construction for this use.

  • Insulated Cooler Backpack Manufacturer: EPE Foam & Cold-Retention Design

    An insulated cooler backpack keeps ice for hours not because of a marketing number on the hangtag, but because of a chain of engineering decisions — the foam in its walls, how thick that foam is, how the seams are sealed, and how the whole system is designed to slow the three ways heat gets in. Most of that is invisible to the buyer and easy for a weak supplier to fake.

  • Food Grade Soft Cooler Manufacturing Standards

    A soft cooler holds food and melting ice against its liner for hours at a time. That makes the liner a food-contact material in the regulatory sense, subject to real law in every major market — not a marketing adjective. Yet "food grade" appears on thousands of listings with no standard named, no test report behind it, and no understanding of the fact that compliance in one market does not transfer to another. This guide sets out what the term actually means under US, EU and Chinese rules, what documentation a buyer should demand, and what a manufacturer must do to earn the claim. Sealock (YiFuLong Outdoor Gear Co., Ltd.) uses food-grade inner liners across its entire range.

  • Marine Cooler Backpacks: Saltwater-Grade Materials & Hardware

    Saltwater does not damage a cooler the way a beach or a river does. It attacks chemically, invisibly, and it goes after the parts a spec sheet rarely mentions — the buckles, clips, D-rings and zipper hardware that hold everything together. A cooler backpack can have a flawless welded body and a 48-hour wall and still fail on a boat because a fastener pitted through after one season. This guide is about the marine-specific side of the specification: which materials survive chloride exposure, why the splash zone is the worst place to be, and what to demand of a supplier. Sealock (YiFuLong Outdoor Gear Co., Ltd.) builds welded cooler backpacks for marine use.

  • Waterproof Cooler Backpacks: How Welded Construction Keeps Water Out

    "Waterproof" is the most overused word in the cooler category and the least defined. It can mean a bag shrugs off a rain shower, or that it survives a full dunk when a kayak flips — and those are not the same product. The precise language exists: the IPX rating system, an international standard that states exactly how much water a bag keeps out and under what conditions. This guide decodes what those ratings actually mean, matches them to the way a cooler backpack is really used, and explains why welded construction is what makes any of them achievable. Sealock (YiFuLong Outdoor Gear Co., Ltd.) builds welded, IPX-rated cooler backpacks, and rates them by test rather than by adjective.

  • Cooler Backpack for Airline Travel and Road Trips

    Travelers are, in effect, running a small cold chain: medication, baby food, snacks and drinks have to stay cold across airport queues, cabin hours, layovers and long highway stretches, inside a bag that also has to behave as carry-on luggage and survive a car footwell.

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