Made of a strong 600 denier polyester (100% recycled fiber), the Seral works in cycling thanks to the angled hipbelt, perfect for the riding position. The reservoir's hose is kept in check with a strong magnetic mount on the belt. - Compression straps - Included: a high quality 1.5 liter Osprey Hydraulics LT Lumbar reservoir - The hose is long enough to reach your mouth while riding - The back panel is an AirScape unit, familiar from many Osprey backpacks: comfy, and more airy than uniform fabric - Mounting point for a led light - Main compartment with pockets for small items and a zippered pocket - The fabrics are free of PFAS, they are bluesign and GRS certified and the reservoir is BPA-free The four first images display the black colour option, while detail images display another colour.