X200 Series-Shoe laces actively worn by Olympic, professional and amateur athletes
 
 The X-series features an ergonomically optimal design for a comfortable fit without tying semi-permanently, making it an indispensable item for triathletes.
 
 The installation method of the XTENEX series is as follows.
 Stretch the laces through the shoe holes (which reduces the size of the knots), select the desired number of knots between the shoe holes, and set them apart. Repeat this process between each shoe hole to fit.