ULTRA PREMIUM Black Magnetic Bubble Seat Cushion for Car Home Office From Unique Imports Eight strategically placed magnets help to relieve stress points in the shoulder, back, seat and legs 90 soft molded foam bubbles stimulate circulation and improve posture Allows air circulation to keep you cool and provides a massaging effect while you sit Elastic strap keeps cushion in place Exclusive From Unique Imports Features Lightweight and washable surface