Nathan VaporCloud 2-Liter Hydration Vest Mesh Imported Dual stabilization system compresses bladder and load Insulated bladder pocket to block transfer of body heat to liquid contents Multiple zippered compartments and stretch mesh stash pockets for organization and increased capacity Side stretch mesh zip pockets hold up to .75 liters and a hidden internal back pocket holds ice pack Load lifter keeps bag contents up and close to the body and the rear external shock cord increases capacity