Technical climbing; Mountaineering Fly: 100D 3L GORE-TEX PRO fabric at easily worn-out parts, 75D 3L GORE-TEX fabric at other parts. Highly durable and rip-stop—tough enough to withstand storms and deal with complex conditions. 3D cutting with gusseted crotch makes it easier to do big moves. Zipper around buttocks—convenient for your toilet tours. Stretchy fabric helps to accommodate insulation layers. Adjustable pant cuff with shoelace hook provides better protection. Fit: Pro