Hydrapak Lone Pine Hydration Pack 70oz(2L) Reversible Elite Reservoir with Shape-Shift Technology with Plug-N-Play and Quantum Clip 250 cubic inches (4L)Gear Storage Weight: 12 oz Silicone Impregnated 100D Trilobal Rip stop, and 210D Nylon Construction, 420 DHD Nylon Bottom Panel Measures 16.25 x 7.5 x 4