The Xtensor is a one size fits all device that comes with 16 fingerbands in 3 sizes and 2 comfort pads. We carry both Yellow and Blue models.Used to relieve symptoms from Elbow Pain Tennis/Golfers Elbow, Wrist Pain from computer use, Thumb Pain, Hand Stiffness, Arthritis, and to make Gamers Hands Interact Faster with their gaming controller! Winner of the prestigious Medical Design Excellence Award, The Xtensor fits on either hand and is the only device with adjustable elastic bands attached to each finger individually. The Xtensor correctly strengthens the finger extensor muscles which are responsible for opening the hands and reaches the tendons deep into the elbow, the site of most elbow pain while also stretching the muscles in the palm and wrist.