Sparter Backpack Cooler Insulated Leak Proof 30 Cans, 2 Insulated Components Wear-resistant Nylon Surface + Waterproof PU Coating + 8mm Foam + Leakproof PEVA Liner ??20 Hours Retention?Sparter backpack cooler is insulated with thickened 8mm (others 5mm) foam, together with advanced silver PEVA seal for blocking UV rays to keep beverages and foods cool up to 20h throughout the day for beach picnic, hiking, camping, trip, boating, baseball/golf games and work. ??Waterproof Lightweight?Our cooler bags are made of high-density scratch-resistant nylon material with extra PU coating ensuring 100% waterproof and easy to clean. Lightweight (1.4 LB) portable design with adjustable padded strap and back, more comfortable than carrying a heavy traditional big cooler. ??2 Insulated Compartments Multi-Pockets?Featured 2 insulated compartments for cooling drinks dry foods, 1 front big pocket and 2 side pockets to hold your snacks, phone, wallet, and other accessories. There is one bottle opener included for more convenience. ??Leak-proof Sweat-Free?Our cooler backpack liner adopts high-tech seamless hot pressing process for leak-proof. We surpport free replacement or return if any leak happens. Additional smooth horizontal zippers enhance its anti-leaking perfectly. ??30 Cans Large Capacity?Measures 17''x10.5''x7.5"( H x L x W) and can hold up to 30 cans (330ml), roomy enough to pack meals, beers, tall beverages, snacks and other necessities. A perfect gift for men and women! ??Buy with Confidence?Take comfort in SPARTER's quality warranty. Our amazing customer service team is also here if you have questions or concerns.