Hydrapak Laguna Hydration Pack, 3-Liter/100-Ounce, Navy 100oz (3L) Shape-Shift Reservoir with Plug-N-Play and Quantum Clip Gear Storage: 600 cubic inches (9.8L) Weight: 1.3lb (0.59kg) 210D Baby Rip Nylon, 210D Nylon, 420D HD Nylon Bottom, Hypalon Construction Measures 18" x 9" x 6.75"