Waterproof & Insulated Cooler Bag. Holds up to 18 cans (12 oz) Built with padding and insulation, YKK Zippers, snaps in for secure placement in your 365 Backpack and rip stop material. Nylon webbing loop at top on each side with plastic triangle. Made only with the best materials, but yet still very light weight. 1 main compartment to keep your lunch or drinks cold. Folds flat until your ready to re-use. The Cooler insert is 12" Long, by 9" wide and 6" deep. It fits perfectly in the 365 Backpack and secured onto the pack with the modular snap system. This Cooler is built with quality and longevity in mind. You buy one and your set for life. Check Product details - https://cghabitats.com/products/hab-gear-backpack-cooler-insert