The large-capacity waterproof and thermal insulation bag waterproof backpack soft cooler bag on the shoulders is made of 840D TPU material, which can store 35-40 cans of beverages to the maximum extent. Weatherproof and airtight, you can store food when you are outdoors, Advanced Cooling Performance, High-quality insulation in 3 unique layers works together to keep your food and drinks cool for up to 3 days. The outer layer has a water-proof surface that ensured no sweat, the middle layer is high-density foam and the interior is fully lined with leak-proof material100% Leakproof and Impact Resistant, soft cooler features a waterproof and tough shell to resistant to punctures and UV rays. The Airtight Zipper with an easy-pull tab keeps the bag cooler leak-proof.BPA Free, The liner of soft-sided coolers is made from BPA-free material, superior quality, and competitive price. Perfect companion gear for lunches, beach picnics, park, tailgating, hiking, camping, or backyard use