Ultraflex USS Adult AFO Joint is useful for making custom ankle supports that help with walking problems, weak muscles, and unstable joints, making it easier to move around. These supports are final and aren't made for stretching. You get one for either the left or right foot. For people weighing up to 220 lbs, use two joints per foot if they weigh over 150 lbs. Use the left joint for the outside of the left foot or inside of the right foot. Use the right joint for the outside of the right foot or inside of the left foot. If the patient is under 150 lbs, use the left joint for the outside of the left foot and the right joint for the outside of the right foot. In that case, Ultraflex suggests using another joint, AFOP-ROM, for the inside of the support.