The Osprey Syncro 20L Backpack carries everything needed to escape the maddening crowds of popular trail riding destinations. This streamlined hydration pack features a bike-specific suspension for added stability and includes a 2. 5 liter Hydraulics reservoir with a magnetic bite valve for convenient drinking on the trail. The Osprey AirSpeed suspension system elevates the pack off our back for increased air circulation eliminating the soaking-wet sensation we hate about less ventilated packs. Hugging our body to support heavy loads the BioStretch shoulder harness and adjustable hip belt keep bouncing to a minimum. The Synchro features various smart pockets for storing all our riding necessities an integrated rain cover a blinker light attachment (light not included) and LidLock helmet attachment which conveniently holds our helmet as we grab post-ride food and drinks.