Sedici Acqua Hydration BackpackThe Sedici Acqua Backpack is constructed from 420 denier and 600 denier polyurethane material with reinforced structure. The Acqua also come equipped with a 3 liter bladder pouch and a 5 liter cargo chamber with a neoprene phone pocket.Overview: Capacity: 8 L Chest Strap: Yes Waist Strap: No Laptop Compartment: No Waterproof: No Features: Rugged mix of 420d and 600d poly backpack with durable self supporting reinforced structure Silicone grip print on padded reinforced shoulder straps keep pack from sliding while on the move connected with 38mm HDwebbing 38mm webbing sternum strap with slide adjustment Heavy duty quick release on elasticated sternum strap Shoulder straps utilize 38mm heavy duty quick release for easy use with gloves and faster refills Hook and loop locating mount for bite valve on shoulder strap for easy locating 3D vented eva molded back pad to promote airflow and venting Humanoid reflection scheme promotes visibility from all directions Main camber with heavy duty hook and loop hanger system for 3Lbladder (included) 5Lcargo chamber with neoprene phone pocket Bladder: 3LBPAand PVC free bladder with slide-lock top Slide top opens to allow you to turn it inside out for easy cleaning and drying RF welded seams Built in quick release allows you to disconnect drink tube for fast refills without disturbing the tube routing Insulated drink tube cover Swivel lock bite valve