Ski straps for the Arcteryx Alpha SK. Length is 65cm, set of 2. By adding these, you can attach skis in an A-frame configuration to the Alpha SK backpack. Also, when attaching a snowboard to the Alpha SK backpack, the included 55cm straps are not long enough, so these are necessary. These are discontinued, so they are considered valuable. They are almost new, having only been used to attach skis at home and never used outdoors. ARCTERYX Alpha SK Strap Thank you.