Made of a durable elastic with a hook and loop closure.
It is used to hold your Gymboss Interval Timer on your wrist using the clip.
Elastic hook and loop stretches to fit any wrist from 6-12 inches (15-30cm).
NOTE: There is also a Gymboss ARMBAND. The Armband and Wristband look identical, but are two different sizes.
Width 1 1/8 inches (3cm).
Also note that there are two official Gymboss retailers on Amazon, Gymboss and Slim Fitness. If ordering an armband or wristband, be sure to order from the same retailer from where you are ordering your timer or your items will not ship together.