Petzl NITRO 3Features Absorbs shock to prevent small pieces, dubious placements or anchors from dislodging during a fall; great for ice, mixed ground and traditional climbs Helps improve security of anchors such as ice screws, small nuts and pitons Webbing is folded and stitched in a way that the stitches will pull out under force and reduce the shock load on the anchor or protection piece Outer hook and loop strap holds the folded webbing in place until shock