You can supplement your Atrack backpack with a professional hydration system consisting of a specially designed, 2 litre hydration bladder, a removable tube, a bite valve with protective cap and a thermal sleeve that keeps your water cool for hours. The drinking tube is inserted through the perfectly watertight sealing ring on your backpack.
FURTHER FEATURES:
+ BPA-free
+ easy to clean
+ tasteless
+ made to last