Kind to your knees and lower back. This ergonomically designed seat subtly rocks with you as you bend and stretch, reducing weight on your knees and strain on lower back. The unique patented contoured wheels allow a full range of motion, letting you move comfortably while sitting or kneeling. Adjustable height, lightweight and easy to carry. Enhance comfort with the optional GB1208 comfort cushion accessory. Designed, manufactured, packaged and shipped by American Workers - We appreciate your support! Designed, manufactured, packaged and shipped by American Workers Easy to use Allows full range of motion.