Make the perfect hair tie with this custom hair tie refill. Simply insert it in the cartridge (sold separately) and cut based on the length, thickness, and texture of your hair. Perfect for any activity! * 13x stronger and 2x stretchier than a regular drug store hair tie * Trusted by pro athletes around the world * Loops determine the size of the tie; the more loops, the more support * Every hair type is different in volume, texture, and style. TIY guarantees that you can tailor it exactly to what you need. Regardless of how fine or thick your hair is, you can make the perfect loop.