The Osprey Seral 7L Biking Waist Pack is designed for serious bikers who need hydration and gear storage without the bulk of a shoulder pack. This 7L lumbar pack includes a 1.5L Osprey Hydraulics reservoir with a magnetic bite valve for easy hydration access. The pack features an AirScape back panel and Airmesh wrap hipbelt, ensuring comfort and stability while you ride. With room for essentials like tools, a spare tube, and snacks, it&';s the perfect pack for technical terrain and everyday biking. Features: Air Scape back panel with contouring lumbar wrap provides maximum stability. Extra thick ridged foam with center air channel for excellent ventilation. Airmesh wrap hipbelt with zippered fabric pockets provide stability and breathability. ErgoPull waist strap closure system allows for proper snug. Included Osprey Hydraulics 1.5 L lumbar reservoir by Hydrapak. Magnetic hip belt bite valve attachment Large zippered main compartment with reservoir sleeve. Easily accessible zippered front pocket with internal tool organization. Dual zippered hip belt pockets Blinker light attachment with reflective graphic.