The RollerAid is an excellent mobility aid for individuals with a below-the-knee injury or disability. This walker allows you to prop your injured leg on the cushion and use your other leg for propulsion around the home, at work, and outdoors. The RollerAid has a tight turning radius, too, so complicated multi-point turns won't hamper your speed of travel. The lightweight RollerAid folds up easily for vehicle storage. The walker height is adjustable from 4'10" to 6'4", supports 350 pounds, and even has a "One Touch Straight" feature. This feature allows you to quickly lock the front wheels so that you can easily move in a straight line.