Ready for a spontaneous mountain biking excursion? The Trailvent 15-liter bike backpack is your ideal companion. Not only does it feature an excellently ventilated Aeroflex 3D suspension, but it also ensures long-lasting comfort with its adjustable back length, well-padded hip and shoulder straps, and chest strap with hydration tube holder. With a well-designed compartment layout, it offers ample storage options: the large main compartment includes a separate section for a hydration bladder, a zip pocket for valuables, and a key holder. The spacious front pocket easily accommodates a pump, tools, and spare tube. Side compression straps toward the top keep the contents of the pack secure, while the mesh outer pockets provide quick access to essentials. Complete with a helmet holder, light holder, large reflective elements, and an integrated rain cover, this bike backpack is equipped for any adventure. Plus, its Eco Finish ensures PFC-free water repellency. The VAUDE Green Shape label stands for environmentally-friendly, functional products made from sustainable materials.