DESCRIPTION For day hikes and multi-use BACK SYSTEM AirContour FABRIC 420D Dobby and 450D PW / HydroShield BODY UNIQUE FEATURES TPU hook and loop pole lash. Stretch mesh side pockets. Hydration system compatible. FEATURES Hydration compatible Zipped top pocket for storing small items such as keys and wallet Front zip pocket for easy access / storage Hidden pole loop Internal zipped security pocket Key clip Large main opening for easy access Lightweight breathable back system Reflective Bike light loop Side compression Stretch bottle pockets TPU hook and loop pole lash Waistbelt Sternum strap with whistle WEIGHT 0.52kg / 1lb 2.3oz BACK LENGTH 19" / 48cm VOLUME 18lt / 1100cu.in