The Chillow Plus pillow is designed to keep your pillow cool. * Chillow PLUS Cooling Pillow is designed to better conform to your body. Activate it one time and leave it in your pillow fulltime. The soothing , relaxing effect gives superior deep sleep night after night.. * Dimensions 13.5" x 20.5" x 0.625" * Extra soft core for light supple support. * New design makes set up fast and easy