Hippos Exoskeleton Limited has developed the Smart Adaptive Knee Brace to prevent ACL injuries.The knee brace combines a sensor fusion system and an inflatable airbag to detect and prevent knee injuries before they occur.The system measures tibial rotation angle and inflates the airbag to restrict further motion when a dangerous rotation is detected.Initial testing on an artificial knee joint showed promising results, with the brace countering twisting motion in just 20ms.