Koolit™ 600 Series Cold Pack, 1 Case of 36 Cast Bandage Covers SIZE: X Large * WAIST MEASUREMENT Select Ear:Left Ear SIZE: X Large * WAIST MEASUREMENT * 43 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) * resists punctures Phase change formulas ideal for products requiring frozen temperatures or extreme cold that may not tolerate dry ice or carbon dioxide