Woot offers Perfect Fit SoftHeat - King Heated Mattress Pad, Soft Microplush Heated Bedding with Safe & Warm Low-Voltage Technology (King) for $38.99 (orig. $99.99). Free shipping for Prime Members.

Product Description:
Heated Mattress Pad - Ultra-Thin Wiring w/ Micro-Velour Plush Top & Auto-Shut Off Feature, 10 Heat Settings (KING)

• Polyester
• INCLUDES: (1) Electric heated mattress pad
• MATERIALS: Micro-Velour fabric with built in micro-thin wires for more even heat distribution without the bulkiness.
• FEATURES: Patented Safe & Warm non-hazardous low voltage technology is safe in the presence of moisture, will not harm pets, and emits no EMFs. Our patented low voltage technology is the only electric mattress pad technology that is certified as non-hazardous.
• CARE INSTRUCTIONS: Micro-Velour fabric top is designed to rejuvenate and warm your bed. Easy care machine washable & dryable; no pilling, shrinking or stretching.
• DIMENSIONS: King - 78" x 80" x 10"
• Luxurious ultra-soft and supportive Micro-Velour fabric top is designed to rejuvenate and warm your bed. Easy care machine washable & dryable without any pilling, shrinking or stretching.
• Patented Safe & Warm non-hazardous low voltage technology is safer than others on the market; saves energy; sleep better in a cooler room. Lighted, simple-to-use controller has large, easy-to-read numbers and on/off switch. Settings range is LO, 1-9, HI. Silent, no-click operation; non-slip back
• No more uncomfortable bulky wires. The ultra-thin wires inside the Soft Heat pads are almost impossible to feel; No annoying hot or cold spots