When your out on an adventure with your little ones, keeping them hydrated is essential! The Osprey Hydrajet 15 gives enough room to pack a jacket, a snack and have water at their disposal full time. With the included 1.5 Litre hydration pack kept in a separate sleeve, they will be able to drink when they want, without stopping. The pack comes with a vented back panel, a hip belt, and sternum strap to keep the pack in place. Bungee straps are located on the back for stuff storage and tightened down for compression.