The Gregory Nano 18 H2O Hydration Hiking Backpack in Navy Blue is a versatile and durable backpack designed for hiking and backpacking adventures. With a 18 L capacity and a zip closure, this backpack features a hydration pack compatibility, a divider system, padded straps, and an adjustable size for added comfort. The ventilated back panel helps keep you cool during long hikes, while the external pockets provide additional storage for your gear. Made of polyester material with a nylon frame, this backpack is suitable for unisex adults and offers a stylish blue color for a functional and fashionable outdoor accessory.