Inside material : Environmental insulation aluminum, Keep 4 hours insulation / 6 hours cold / 8 hours fresh 2: Waterproof : Effective waterproof leakproof 3: High capacity, You can put so many items into it, such as Ipad, cosmetic, food and drinks etc 4: Can be used on the beach, pool, camping, BBQ or picnic on a family day out. 5: Beautiful fashion design, Can be used as handle bag, have a good mood