AirCast® A2™ Left Wrist Brace With Thumb Spica, Small, 1 Each Digit Exercise Products Massage setting to relax lower Aluminum band assists in Massage setting to relax lower back or neck * Can provide relief from conditions aggravated by poor posture * Place between your knees while lying on your side for a more comfortable sleep * Can be used in combination with the ObusForme© Highback Backrest Support or your car s headrest for added neck support * Made with polyurethane foam * Elastic strap holds the ObusForme© Supporting Roll with Massage in the position you desire * Brushed polyester cover can be removed and sponge washed * Small lightweight and portable for use anywhere you sit at home in the office and on the go * Battery Operated 4 AA batteries (not included) * 6 inch elastic and pile foam construction and post removal of casting or splint Designed to provide support for wrist injuries