High capacity insulation and leak-proof: Soft freezer bags with high density insulation thickening material and upgraded leak-proof lining prevent leaks and keep food hot/cold for 16 hours Multiple compartments: 1 main compartment for placing ice packs and drinks and food; Front zipper pocket to store cutlery; 2 large side pockets and mesh pockets are ideal for storing wine or water bottles. Durable and ergonomically designed: This lunch bag is made of durable nylon that won't rip, tear or scratch, but is lightweight and easy to carry. At the same time, this backpack cooler has an adjustable shoulder strap and an ergonomic design to meet the needs of different populations