Extra Large for Full CoverageThe heat pad measures 24"x33", offering full and snug coverage along contours of shoulders and back, and delivers penetrating soothing heat to warm your body; The heating range is extended to the neck collar area for more comprehensive care Hands-free & StableThe electric heating pad stays in place around back and shoulder areas for hands-free convenience with magnetic clasps, slightly weighted edges and fixture straps, without slipping or coming loose, which also keeps the pad flat during the use Adjustable Heating & Timing Setting4 heating levels are optional with minimum gaps between temperature ranges, easier to choose a desired level; 2 adjustable auto-off timer settings avoid excessive heating and energy waste, safe to users and friendly to environmen Super Soft & Easy CareThe skin-friendly flannel is elegant in texture and soft to the touch, and helps the heating wire spread heat more evenly; The entire pad is machine washable after removing the controller, prolonging service life with hygiene and softness all along SafetyThe wrap heating pad will shut off automatically when overheating to ensure safety