The UTX Stable 80/120 with its system of locking in standing and walking positions, can be compared with conventional system of bracing . Walking with enhanced natural and smooth movement is achieved through planta flexion ankle joint with active spring control. Knee is locked during standing and walking. The knob at the device top is pulled for an easy unlocking process aiding safe sitting down when compared to conventional calipers. The 750 grams / 900 grams low weight device with fixed equinus and non-weight bearing caliper can be used with body-weight up to 80 kg (12 stone) /120 kg (19 stone).