features46 % lighter than the previous models with fabric tapewithstands the rigours of touring and riding in the backcountry the thin, flexible pads are the only parts that touch the shoethicker ribs and attachment points are kept away from the shoesoft and firm at the same time in a single piece.pillow line straps do not absorb water or freeze in warm conditionshave a flex window for maximum mobilitysolid one-piece construction