Source Tactical Advance Mobility 3-Liter Hydration Pack High-performance, multi-functional hydration pack; 3-liter WXP hydration bladder (100 ounces) Can be worn backpack style, inserted in rucks, or direct-attached to MOLLE on vests or rucks Tuck-away shoulder straps; sternum strap for added stability; zippered top opening for quick access to reservoir; external fill port Taste-free WXP reservoir with wide, easy-access opening; non-bite Storm push-pull valve for straw-like drinking; BPA and phthalate free Drinking tube with Cool Weave cover blocks UV light and insulates; compatible with QMT accessories