Best lifting cushions. Uplift-Technologies---Bodyhealt brand. New releases 2021

Lifting Cushion Seat Assist Chair Seat Lift - Weight Limit 80-230lb (36-159kg)

Self-Powered - A hydro-pneumatic gas spring serves as the lifting mechanism, releasing automatically when you begin to stand. No battery or electricity required.
Easy Care - The foam cushion has a water resistant coating that can be wiped down with mild soap and water.
Waterproof - The breathable fabric cover is waterproof and machine washable in cold water. Comes in black.
Durable - The injection-molded base is made of durable polycarbonate, and covered with a non-slip material that prevents shifting on fabric seating surfaces.
Safe - The flexible seat curves to a flat surface that lifts you up on a level plane. This patented LeveLift design provides for a safe lift up, with no forward dumping motion. Patent # 5,316,370