Seat assist is a non-electric, portable lifting seat that can gently lift or lower up to 70% of a user's weight. It is adjustable for user weights up to 350 lbs. The lifting mechanism of the Seat Assist engages as soon as the sit-to-stand motion is initiated by the user. Non-slip material on the base prevents shifting on seating surfaces and a built-in handle that makes carrying easier.Features - Doesn't use electricity, perfect for restaurants, theaters, church, park bench.- Flexible seat curves to flat surface that lifts to a level plane without dumping you forward.Specifications - Product weight : 8.75 lbs- Weight capacity : 200-340 lbs- Cover : Blue polyester fabric- Cushioning : High density foam- Seat : 17" (W) x 19" (D)