... certificated...Velcro wrist strap,Velcro wrist band,Velcro strap... features and usage:1) Velcro strap is made of 100% nylon.2) Self-gripping, infinitely adjustable and reusable.3 ... ...5) Colors: Red, Orange, Blue, Green, White, Black, Gray, Brown etc. Any color and size, logo can be customized according to buyers ...