X3 Backdoor is a lightweight 30-litre backpack for ski mountaineering and alpinism: the ideal model for "fast and light" excursions. The backdoor opening at the back allows effortless and immediate access to the material at the bottom. This is a great advantage especially on windy peaks. Made of particularly light and resistant fabric, with appealing graphics. Due to the large side mesh pockets, the spacious lid pocket and the pocket on the hip belt, the basic equipment is always ready to hand. The Xpress system allows you to attach and detach your skis from your backpack without removing it. The hip and chest straps have EZ OP buckles (C.A.M.P.), which are easier to open. With the EZ OP buckles, it is sufficient to pull the red pin, which can also be operated comfortably with gloves, so that the opening opens immediately.