Source Outdoor Pulse Hydration System Pack with 1L Cargo Pouch Lightweight hydration pack with 3-liter Widepac hydration bladder and 1-liter cargo space Detachable front pouch enables you to add cargo when you need it; ideal for trail running, hiking, and more Mesh shoulder straps; adjustable sternum strap; removable waist belt; 70D ripstop nylon construction Taste-free reservoir with maintenance-free Glass Like liner prevents bio-film build-up Rounded Helix bite valve delivers a full flow with just a soft bite; built-in safety shutoff mechanism