XL Size & Soothe Aches: The electric heating pad measures 15"x 24" to cover larger areas of your back and lumbar. Hands-Free & Adjustable Strap: This wearable heated back wrap stays in place for hands-free convenience with a flexible and adjustable strap, the total length (includes heating pad) can stretch from 32'' to 51'', fits most people. So you can enjoy hands-free pain relief without slipping or coming loose（Please avoid folding it when it’s turned on in case of damage） 9 Heat Settings & Backlight Function: Our Comfytemp lower back heating pad offers 9 heat settings, allowing you to customize the desired temperature to relieve fatigue and muscle stiffness, or keep you warm as the cold draws in. And the memory function could help you remember your favorite temperature. Plus, the light-up display makes it convenient for nighttime usage 5 Auto-off Timers & Stay On: The back heating pad features 5 auto-off range from 0.5-1-2-4-8H, offering more timer options while avoiding excessive heating and energy waste. With the stay on mode, it will heat continuously without shutting off, providing uninterrupted relaxation Soft Flannel & Machine Washable: This skin-friendly fabric is elegant in texture and super soft to the touch, helps the heating wire spread heat more evenly, providing maximum comfort for your entire body. The XL heating pad is machine washable after removing the controller, prolonging service life with hygiene and softness all along