Leakproof and Insulated Our backpack uses density wearresistant insulation inside and 600D outer fabric. The interlayer features 5mm thick pearl cotton to extend heat preservation and cold time, keeping contents fresh for up to 24 hours. The inner lining is PEVA insulation, and a secure sealing design helps prevent water leakage. Multipocket design Six pockets for organized storage: 1 large main storage compartment, 2 side mesh pockets, 1 large front zipper pocket, 1 front velcro pocket for utensils, and 1 mesh pocket on the shoulder strap. A beer opener is included for convenient access. Comfortable and portable Designed for both men and women, this backpack offers a large capacity with light weight. Adjustable shoulder straps and an ergonomic shape provide comfort, while padded mesh straps and back ventilation help when carrying many items. Dimensions and capacity Size: 29 x 19 x 45 cm (11.5 x 7.5 x 18 in). Capacity supports carrying up to 20 cans of 330 ml beer or 4 bottles of 500 ml cola, along with drinks, snacks, towels and a picnic mat. Use scenarios Park or picnic outings: store beverages and food together, keep drinks cold for hours, and have utensils and essentials organized in convenient pockets. Beach or camping trips: waterproof and leakproof design protects contents; carry drinks, snacks, towels and small gear in one bag. Outdoor events or day trips: easy to carry lightweight load, multiple pockets keep items accessible and organized while on the go.