The lightweight Outdoor Products H2O Performance Hydration Pack is a great choice for trail runs and rides, when all you're looking for is hydration, and a place to keep your ID and other small necessities. The breathable shoulder straps and cool mesh back keep you comfortable during your cardio workout.Lightweight performance hydration backpack. Easy bladder loading system. 2L Cyclone? Hydration Reservoir included. Breathable shoulder straps. Adjustable sternum strap. Cool mesh padded back. Compact main storage compartment for personal items. Dimensions: 17in. W x 7in. H x 1in. D / 250 cu. in. Import.