1.Cold Up To 20 Hours Holds 20 Cans The cooler backpack weighs only 0.4KG.Dimensions:33x29x16cm.The insulated inner heatsealed thick peva lining keeps the inner cold for up to 20 hours with ice pack. It is big enough to hold 20 cans for a fun day's worth of drinks and food. 2.5Layer Performance Protection The base compartment of this cool bag backpack is made of PEVA material, offering exceptional insulation. In its 2024 upgrade, the material has been enhanced to provide increased durability and improved effectiveness in keeping the contents cold and fresh from morning to night. The interior lining is leakproof. 3.Leakproof Water Resistant The inner food grade TPU coating combined by hotpressing technical makes the cool bag leakproof. Meanwhile performance outer 400D polyester nylon fabric with weatherproof and long lasting metal zipper pullers make the bag weatherproof. 4.Comfortable Versatile It comes with thick padded shoulder straps and breathable padded sections on the rear of the backpack to effectively reduce pressure on your shoulders. If you are an outdoor hiking,picnic and camping enthusiast, this cooler backpack is a choice!