The UTX FS is a lightweight long leg brace (also called KAFO, orthosis, or splint) and extension of the UTX line. Standard the UTX orthosis is designed with a unilateral knee hine. This means that only on the outside of the knee a hinge is placed. That’s nice for you because the orthosis takes less space and therefore it’s easier to put a pair of pants over it and you can not knock with your other leg to the hinge at the inside while walking or sitting.
It does mean that the UTX is less suitable for frontal loading, which happens if your knee is unstable in a knock-knee (genu valgum) or a bow-leg (genu varum). For those situations, the UTX FS option has been developed. With this option, the UTX is also suitable to provide stability at the frontal level, with a valgus or varus knee. The FS can be combined with all other variants of the UTX.