Thanks to the EXTRA WIDE HIP WINGS, the ventilated AERO FLEX belt and the optimized AIR FLOW CONTACT SYSTEM it not only sits safely and closely in place, it also distributes the weight perfectly for extra comfort.Wide ventilation channels and the coarse mesh on the back section provide efficient airflow further enhancing comfort.EVOCs VENTI FLAP with uphill and downhill modes offers extra ventilation when ascending and an even tighter fit while descending.If you encounter technical problems on your ride, the exterior quickly and easily accessible TOOL COMPARTMENT will hold repair kit, tools, etc. The pack is also equipped with COMPRESSION STRAPS to adapt the volume, a BACKLIGHT CLIP, a KEY CLIP, spacious zippered pockets in the hip wings and much more. The bag is made of lightweight yet highly durable recycled Ripstop Nylon with PFC-free finishing.VENTI FLAP for up- and downhill mode adjustmentAIR FLOW CONTACT SYSTEM offers perfect back ventilation.TOOL COMPARTMENT WITH QUICK ACCESSEX