The Hammers 2L hydration pack features an ergonomic fit and streamlined design. A great pack for a quick trail ride or hike. Dedicated Anti-Sloshing hydration bladder compartment with hook-and-loop secure strap for holding bladder in place and tube channel port. Insulated Cooler Fabric lining that keeps liquid cold for 30% longer. Front compartment with mesh ventilation for accessories. Ergonomic padded back with directional airflow. Multi-Adjust harness system designed for easy maneuverability; built for precision fit of all body types. 70 ounce / 2 liter bladder - Made in U.S.A .custom mPE/EVA film, naturally anti-odor, BPA-free, zero taste, and odor-free. Features a top fill closure and anti-slosh stabilizing handle for easy fill and cleaning. 150D mini honeycomb rip stop with TPE backing and 420HD Oxford nylon with PU backing.