Osprey Jet 18 is an 18-litre lightweight day pack made for children who want to carry their own gear on day trips. The ventilated AirScape back panel allows air to circulate against the back while keeping the pack close to the body, so it follows the child's movements whether walking, running or cycling.

The main compartment has a wide top-loading opening for easy access. The pack is equipped with two elasticated mesh side pockets, a large mesh front pocket and a small external zip pocket. Also included are attachment points (daisy chain), a chest strap and an internal sleeve for a hydration system. A hydration bladder is sold separately.

The materials are GRS-certified recycled nylon with a PFC-free water-resistant treatment. The pack weighs approximately 0.5 kg and is recommended for children aged approximately 8–14 years.