Durable polyester/ripstop blend fabric. Easy bladder loading system. Includes 2L Cyclone Hydration Reservoir. Breathable shoulder straps, adjustable sternum strap. Several color options. Dimensions: 7L x 1W x 17H in.. When you're outdoors, the last thing you want to be is out of water. The Outdoor Products H2O Performance Hydration Pack keeps water flowing all day. Crafted with durable polyester/ripstop blend fabric, this pack boasts an easy-loading bladder system that accommodates the included 2L Cyclone Hydration Reservoir. Breathable shoulder straps, an adjustable sternum strap, a cool mesh padded back, and a compact storage compartment for personal items make this a must-have. Choose black or iguana.