The Air Fuse gives you a mix of light-weight simplicity with added comfort. Perfect for MTB rides - and any outdoor activity. For this new bike pack we took our popular Fuse 12L and added extra comfort for your back and shoulders. An ultralight metal frame, combined with a mesh back, provides optimal ventilation of the back. A light padded mesh hip belt stabilizes the pack during bumpy rides. * Maximum back ventilation thanks to engineered back structure with ultralight metal frame and mesh fabrics providing airflow * Padded stabilizing lightweight hip-belt * Lightweight Fabrics * Padded shoulder straps * Adjustable sternum belt with integrated whistle * Lightweight buckles * Essentials compartment with internal Storeganizer, key holder, pen pockets * Velcro sealed phone pouch * Insulated hydration compartment * Raincover included * Carrying handle SOURCE Hydration Features * Widepac™ hydration system * Helix™ bite valve - Comfortable valve with safety shut-off mode * Co-Ex tube * Triple layer taste and odor free film * Glass Like™ Film Technology * Grunge-Guard™ Technology * Taste Free™ System * Easy Care & Low Maintenance Volume: 9 l (+3 l Widepac™ hydration system) Weight: 800 g / 1.76 lb (without WIdepac™)