Features Polyester Bullett-Point1 Description span class=key_feature_class_titleKEY FEATURES/span div class=key_feature_classAir Mesh suspended back panel improves ventilation for comfort in hot environments Includes 3L Hydrapak reg Reservoir for easy on the go hydration Ergonomic shoulder straps are made using breathable mesh /div However youre getting around having your hands free makes everything just a little bit easier Thats why the Dakine Amp 12L Backpack features so many storage options for everything you need to keep on hand Two simple stash pockets on either side are great for storing water bottles or other accessories and theres an internal organizer pocket to make sure you can always find smaller items when you need them For serious hydration the included Hydrapak reg reservoir can carry up to three litres of water working with the ventilated back panel and harness to keep you cool no matter how warm it gets div class=specs_features_classspanSPECS/spanVolume (Liters) 12 /div