Osprey Siskin 12

With a little more room and a focused feature set, the Siskin 12-liter is a well-balance performance mountain biking pack for adventurous day son the trail. Coming with a next-gen 2.5-liter reservoir, it also has a generous main compartment with plenty of room for your spare tubes, multi-tool, trail pump, extra lightweight layers and more.
Features
Upper side compression and full face helmet carry
Direct access zip path to reservoir compartment
U-zip main compartment access
Front fabric shove-it pocket
LidLock helmet attachment
Blinker light attachment
Magnetic sternum strap bite valve attachment
Hydraulics LT 2.5 L reservoir included
Main compartment tool organization
Zippered hipbelt pockets
Zippered scratch-free heat-embossed slash pocket