The Swiveling Seat Cushion.

This seat cushion swivels 360º to assist those who may have difficulty entering or exiting a car. Mounted to a fixed platform, the cushion spins smoothly on ball bearings when you shift your weight--similar to a barstool--enabling you to maneuver easily without putting undue stress on your legs and torso. The cushion is padded with 1 1/2" of memory foam that molds to your body for comfort and support. The durable beige microsuede cover can be removed and machine washed. Because of its light weight and compact size, it moves easily from one vehicle to another or may be used with most chairs. Supports up to 275 lbs. 15" Diam. x 3 1/2" H. (6 lbs.)