(THIS PRODUCT DOES NOT INCLUDE THE THERMACYCLE MACHINE) Thermacycle is a self-contained water circulating system that utilizes automatic thermoregulation to maintain an adjustable temperature. OPERATIONAL HIGHLIGHTS System temperature range 46F to 118F Micro-tubes carry the water through the bladder ensuring no seam leaks or bursts Fill with approximately 27 ounces of water This is a Medical Grade HOT/COLD WATER CIRCULATING MATTRESS PAD that provides a thermoregulation to help keep your body at a comfortable temperature while you sleep. Water circulates throughout the pad, maintaining temperatures anywhere from 46 F to118 F in order to prevent cold or hot ‑ flashes during the night. Save on your electric bill and sleep in optimal comfort summer or winter. The is nothing like experiencing cool sheets on a hot summer night, or a cozy warm bed on a cold winter night. THERMACYCLE PILLOW PAD: This climate-controlled pillow pad is for use with the Thermacycle Sleep Machine (Sold Separately). Our pillow pad plugs into the Thermacycle and circulates water from the machine to the pad so you can create the perfect sleeping environment, no matter how hot or cold it is. This pillow pad requires a Thermacycle Unit with Mattress Pad to properly function. SINGLE ZONE HYDRO-BASED HEATING AND COOLING: Thermacycle’s single temperature zone allows you to control the climate of your pillow with the click of a button. Unlike other heating and cooling pads, our deluxe water-based system doesn’t generate EMF radiation, ensuring a consistent and comfortable sleep environment. Don't waste electricity with fans that won’t cool your core and improve your temperature when sleeping. SUPPORTS REM AND RESTORATIVE SLEEP: Better, deeper sleep starts with regulating your body’s internal temperature. Thermacycle’s constant climate control technology helps maintain homeostasis so you can experience healthier, more restful sleep. This water cooling technology can help reduce hot flashes in menopausal adults and is the number one sleep aid for adults in the world. There is no other menopause cooling pad in the world as effective as the Thermacycle pads. REDUCES NIGHT SWEATS AND SOOTHES MUSCLES: Reduce sweating and rehab your muscles naturally overnight with Thermacycle’s cool setting. Cryotherapy-style cooling prevents overheating and soothes your muscles while you sleep so you wake up feeling fresh and rejuvenated. Unlike many other cold therapy products, this water cooled pillow pad is the only cooling pad for sleeping with a temperature range from 46ºF to 118ºF. Start sleeping easier tonight with this cooled and heated pillow pad system.