Amazon offers Pure Enrichment PureRelief XL King Size Heating Pad (Charcoal Gray) - Fast-Heating Machine-Washable Pad - 6 Temperature Settings, Moist Heat Therapy Option, Auto Shut-Off and Storage Bag - 12" x 24" for $32.99 $27.99，free shipping
FULL BODY RELIEF: Extra-large 12” x 24” heating pad is perfect for treating sore muscles in your back, shoulders, abdomen, legs, and arms.
SUPER-SOFT MICROPLUSH: Thick microplush fibers offer maximum comfort for daily use.
FAST-HEATING: Heats in seconds to provide fast pain relief to aching muscles.
MOIST HEAT OPTION: Safely use for moist or dry heat therapy.
5 YEAR WARRANTY: Your satisfaction is guaranteed thanks to our industry-leading warranty program.
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