Sleep on the PCM - Phase Change Material mattress pad, controling your body temperature and keep you comfortable and feel cool all night long. PCM is a smart substance absorbs excess heat from your body and store it, and increases body temperature when low. Creating a comfortable and stable sleep environment, so you are staying comfortable during the whole night. Try it together with Peace Nest PCM Cooling bed pillow, makes you a wonderful sleeping. DESIGN - Super stretch skirt fits mattress up to 15 inches deep FABRIC - PCM Tech Cooling Shell FILL - 100% polyester DIMENSIONS - KING SIZE - 78''x 80''QUEEN SIZE - 60''x 80''FULL SIZE - 54''x 75''TWIN SIZE - 39''x 75'' CARE INSTRUCTIONS - Machine Wash