Amazon – SkyNature 24" x 12" Electric Heating Pad - $14.99–

Pain Relief & Muscle Relaxation: This heating pad delivers soothing heat for your back, lower back, neck, shoulder, knees, legs and other body parts. It relieves neck and back pain as well as muscle stiffness caused by exercise or daily work. Even gentle warmth boosts circulation, eases muscle & joint soreness for full‑body relaxation. It heats fast, maintains steady warmth when powered on and is reusable for daily heat therapy.
Safe Auto Shut‑Off Protection: Customized soothing heat to relieve back pain and period cramps. It offers 12 timer options from 1‑12 hours: the heating pad will run for your selected timer duration then power off automatically. Comes with 9 adjustable temperature settings ranging from 86°F to 158°F. Note: Do not leave it on overnight unsupervised; sleeping while using is not recommended.
Ideal Gifts for Every Occasion: Perfect stocking stuffers, mom birthday or Christmas gifts for teens and seniors. This heating pad is a thoughtful gift for men, women, parents and friends. It offers custom monogram initials (M, L, D, C, J and more) for personalized gifting. Portable for home, office and dorm use. Suitable for housewarming, get‑well and anniversary gifts — everyone deserves a touch of warmth.
Luxuriously Soft, Skin‑Friendly Cover: Made of premium microplush fabric with quilted wave design, this heating pad delivers velvety‑soft skin‑friendly touch and even heat distribution. Built with safe internal heating components, the cover is machine washable. It maintains consistent surface warmth, great for relieving sore muscles, back pain and keeping cozy in cold weather.
Extra‑Long Cord for Freedom of Movement: Enjoy the warmth anywhere you need it! This heating pad comes with an extra‑long 7‑foot power cord. The long power cord gives great flexibility to use it in bed, on the couch, or at your desk‑perfect for home, office, or dorm use. Say goodbye to short cords and limited comfort zones.