Description:1. Safety non-toxic environment.2. Compressive resistance to abrasion.3. Tube connected to the bottom of the bladder4. Can be put into backpack and backpack's shoulder strap5. Can be used to store water with -20 to 40degree celsius6. Foldable design Specification: 2.0L Bag Size: 34cm * 17cm Thickness : 0.50MM Tube:106cm Package Included:1Pcs Water Bag