The Jet 18 pack offers a simple feature set and comfortable carry in a pint-sized package. Outfitted for the trail, this pack features a large bucket-style opening for easy access on the trail, simple pocketing for trail snacks and treasures, daisy chain attachment points and space to carry a reservoir if needed. Whether they're skipping rocks or catching toads, the Jet 18 encourages movement and makes outdoor outings more enjoyable.. . . . . Sized for kids, designed for hiking.. Airscape Backpanel: Ventilated and close-to-body carry allows dynamic body movement whether skipping, hiking or biking down the trail.. Hydration Compatible: An included Osprey Hydraulics LT 1.5L reservoir with the HydraJet 12L or an easy add-on for the Jet 18L. Dual stretch mesh side pockets. Large front stretch mesh pocket. Small external zippered pocket. Lower web-loop daisy chain attachment points. External reservoir sleeve. Top-load access to main compartment. Volume: 1098 IN3 / 18 L. Dimensions: 18.11H X 9.45W X 8.66D in.. Weight: 1.14 lbs. Fabric:400D Recycled Nylon Packcloth. Spot clean. Imported.