THIS IS THE MOST INCREDIBLE PRODUCT I HAVE My Isocentric® RGO (reciprocating gait orthotic) leg braces allow me to stand erect and walk. They also stretch my hip flexors, and knee tendons, which have contracted due to sitting all day. They were molded to fit my lower back and lower legs so the fit is exactly correct. Walking (stiff legged of course) is amazing after sitting for so long. It is very hard work, though, and is a good workout. I started out using a walker for balance and have graduated to using forearm crutches, which are a big challenge. I'm one of the 20% that keep at it (80% of the people who get the leg braces give up on them).