It is an elastic lace 1.2m long that you install from top to the bottom of the shoe and clip the holder to the metal parts, that we previously install into the top of the shoe holes. Basically they fit in every shoe with holes and is cut at the end on the right dimension. Because of simplicity it can be used by 3 years old child or old people, seniors. Also great for people with disabilities, down syndrome, autism, cerebral palsy… We got patents for USA already and patent pending in other countries. Product was funded on kickstarter in 2017 and raised 143000$. We also got the highest reward for innovation in Slovenia. We make people more independent and fashion forward.