I was kind of skeptical about this pillow, but it has some really good reviews.

Original Outlast® technology regulates temperature as you rest, helping to prevent overheating. To care, place pillow in pillow case or cover prior to use and machine wash. Standard size. Made in USA.

Pillow absorbs heat when it gets too warm, and releases it once you cool down..Thermocules™ keep temperature at optimum range for sleep