Serta | Damask Stripe 233-Thread Count Low-Voltage Electric Heated Mattress Pad (Queen) Polyester-blend MATERIALS: 233 thread-count 80% polyester/20% cotton dobby stripe decorative shell FEATURES: Patented safe & warm non-hazardous low voltage technology is safer than others on the market; saves energy; sleep better in a cooler room; Single control automatically shuts off after 10 hours for convenience, safety and savings; giant backlit display with auto dimming feature for night time adjustments with out having to turn on the lights CARE INSTRUCTIONS: Incredibly soft 233 thread-count 80% poly/20% cotton dobby stripe decorative shell is that is completely machine washable & dryable without any pilling, shrinking or stretching DIMENSIONS: Queen - 60" x 80" x 10"