DESCRIPTION For trekking and day hikes BACK SYSTEM Fixed AirZone FABRIC 210D 6.6 Mini Ripstop / HydroShield BODY UNIQUE FEATURES Zipped front pocket. Stretch mesh side pockets. Upper and lower compression straps. FEATURES AirZone breathable back maximising airflow Forward pull hipbelt adjustment Hipbelt pockets for easy access storage Hydration compatible Ice axe loop Key clip Light loop Rain cover Secure internal lid pocket Secure TipGripper walking pole attachments Single buckle entry to main compartment SOS panel Sternum strap with whistle Stretch water bottle side pockets Upper and lower side compression straps Zipped front pocket WEIGHT Medium Back Length - 1.07kg / 2lb 6oz  Long Back Length -  1.18kg / 2lb 10oz BACK LENGTH Medium Back Length - 18" / 46cm Long Back Length - 20" / 51cm VOLUME 35lt / 2135cu.in