Ogio Adult Baja 70 Oz. Hydration Backpack 2 stretch mesh pockets on shoulder straps for storing GEL packets and/or Bite Valve docking station. Ergonomically padded Air mesh shoulder straps for wicking moisture away from the body Raised Air mesh POD back panel directs airflow cooling down the body while transporting moisture away from your skin. Tailored paneling to control slosh and bladder movement Large compartment for stowing excess layers of clothing, gear and tools. Small compartment with mesh organizer for easy access to gear. Electronics /personals drop pocket on the top of the bag External bungee cord system for overflow storage is removable and storable when riding in wooded areas. Reverse coil zippers help keep out dirt and debris Storage Capacity: 400 Cu. In / 6.55 Liters. Comes with 70 oz. / 2 Liter OGIO bladder made from BPA-free polyurethane film protected by Microban antimicrobial technology. Weight: 1.2 Lbs.