For buttons and front cans of skirts and pants (unisex). The waist size can be extended by about 1.6 inches (4 cm). The length and stretch of the part will increase the size. Installation is very easy. The material is skin-friendly silicone. That mechanobiru has been renewed! The front can and buttons are larger up to 1.6 inches (4 cm). The front ring is slimmer than conventional ones, and it can also be used with womens fronts up to 0.2 inch (6 mm). The buttons are made of polyester for easy fastening.