Black cooler backpack 40 cm. Cooler bag in the shape of a backpack. The bag has an insulating (isothermal) layer on the inside, reinforced and adjustable handles with padding for extra carrying comfort. Plenty of space for storing your lunch and bottles/cans of drinks. Size: 31 x 40 x 18.5 cm. Capacity: 23 liters. Material: soft polyester, aluminum. Cooler backpack/gym bags. Ideal for on the go/traveling, in the park or at the beach.