Insulation material and leak-proof liner inside of the insulated backpacks work together to keep things cold or hot for hours and make sure anti-leaking. The interior lining is made of excellent upgrade material and easy to clean.30 Cans/30L, cooler backpack roomy enough to pack meals, beers, beverages, snacks and all your other necessities. Perfect insulated cooler backpack. 1 main large soft coolers insulated leak proof storage compartment for drinks or food; 1 zipper pocket in front for your dry items, and 1 zipper pocket on the lid used to organize small items; 2 plus large mesh side pockets which are perfect space for tall beverages or water bottle and 1 beer opener,portable cooler backpack is perfect for lunch, work, sports or daily uses. As well as a soft cooler for beach, picnic, hiking, fishing, camping, road trips, travel or other outdoor activities. Free to contact us for custom logo.