Ogio 122006.501 Atlas 100 oz./3 Liter Hydration Pack - Stoke Pattern 2 stretch mesh pockets on shoulder straps for storing GEL packets and/or Bite Valve docking station. Low profile design fits under/over roost deflector and jersey 600D/400D Polyester exterior is durable and has a DWR coating to protect against extreme weather conditions. Rider friendly padded shoulder strap with adjustable sternum strap and tube routing system Padded Air mesh shoulder straps and back panel for wicking moisture away from your body. Tailored to control slosh and bladder movement. Zippered stash pocket on front for essentials and small gear One-piece zipper pulls reduce weight and noise during active pursuits. Reverse coil zippers help keep out dirt and debris Storage Capacity: 175 Cu. In/2.86 Liters. Comes with 100 oz./3 Liter OGIO bladder made from BPA-free polyurethane film protected by Microban antimicrobial technology