A narrow 1" version of the velcro wrist straps for the Galaxy, Atlas, or N3 altimeters. Normally used in conjunction with the hand mount.

To replace the strap, simply slide the old Velcro strap out from the hand mount and slide the new one in. If the old one is sewn in place, you may need to unpick a few stitches (see your local rigger if you need help with this). The new strap can optionally be sewn in place.