Hydration Backpack Da 3 Litri Colorazione TanHydration backpack The backpack is made of durable nylon and combines the advantages of a typical backpack and a hydration insert cover. The hydration insert compartment is located in the back part of the case and it is 300 x 200mm big. It is held by the main compartment and is 390 x 235 x 80mm big and is closed with a zipper. The smaller compartment is 240 x 220 x 60mm big and is perfect for carrying documents and other minor objects and also food or