Three Liter Hydration pack, backpack, very durable and very resistant, water proof, 600D -oxford  material.  This lightweight and comfortable hydration backpack is a terrific companion to keep you hydrated while running, cycling, hiking or while on any adventure outdoors. And this pack comes with a pouch on the back to store your phone and essentials. High Capacity – Fully removable 3 liter (100 ounce) water Bladder, a great backpack for men, women and kids to stay hydrated.  4 Colors available Khaki / Black / Camo ACU / Army Green.