HEATED DOG BED: This cuddler style heated dog bed cradles your pet in warmth and comfort; features soft foam walls for your dog's comfort OPTIMAL TERMPERATURE: Electric heated dog bed is thermostatically controlled to automatically warm to your dog's normal body temperature only when your doggy is in the heated pet bed ENERGY EFFICIENT: Heated dog bed is low wattage and extremely energy efficient; the thermostatically controlled 6 watt heater is removable for use in all seasons MACHINE WASHABLE: K&H Thermo-Snuggly Sleeper heated dog bed features a removable cover and pillow for easy wash and care SAFETY: K&H heated pet beds are tested & certified by MET Labs and exceeds USA/CA electrical safety standards; K&H doesn't just use safety listed parts, we safety certify the entire product - For indoor household use with 110/120 volt electrical current only HOW IT WORKS: This heated bed may NOT feel warm to the touch when your pet is NOT in the bed; it emits a small amount of heat when not in use (pets can sense it), but only warms to max temperature when your pet is using the bed - see “How to Test” image SIZING: The K&H Snuggly Sleeper is available in two sizes; the medium (recommended for pets up to 30 lbs) exterior measures 26" x 20" x 5.5" and the large (recommended for pets up to 50 lbs) exterior measures 30" x 22" x 6" COLORADO USA BRAND YOU TRUST: Designed by K&H with OVER 20 years of experience in creating safe, innovative, quality products for pets