Lightweight and portable, this comfortable seat automatically lifts up to 80% of your weight to help you rise easily from any chair. The automatic springs let you choose the weight setting that's right for you (ranging from 80 to 250lbs). When you sit on the high-density foam cushion, your downward motion is also controlled, so you can sit gently without "falling". Designed for portability, it has a built in handle and weighs only 8lbs.