What Our Gearhead® Experts Are Saying:"The Jet 18 is perfect for getting kids excited about the trail. It fits comfortably, holds their essentials, and is hydration-compatible, so they can stay fueled and happy on longer hikes."The Osprey Packs Jet 18L Hydration Pack is built to inspire young adventurers to explore the great outdoors. With a comfortable AirScape™ backpanel and a kid-friendly design, this pack is perfect for hiking, biking, or any trail-bound escapade. Its bucket-style opening makes loading and unloading simple, while multiple pockets—including dual stretch side pockets and a large front stretch pocket—keep essentials like snacks and treasures close at hand. The Jet 18L also features an external reservoir sleeve, compatible with the Osprey Hydraulics® LT 1. 5L reservoir, so staying hydrated is a breeze. Daisy chain attachment points add versatility for extra gear, encouraging kids to embrace movement and adventure in every outdoor outing.