This is the cooling gel pillow that dissipates body heat to create a more comfortable sleeping surface. The soft endothermic gel interior absorbs cool ambient air and transfers the cooling sensation to your head and neck in 10 seconds. A study by the University of Pittsburgh School of Medicine has shown that cooling your head at night can mitigate brain hyperactivity, helping you fall asleep faster. The substantial gel interior creates a stable sleeping surface that contours to the shape of the head and neck like memory foam, providing support while remaining supple. Thousands of micro air beads underneath the gel provide flexibility and facilitate air circulation to help maintain coolness. The exterior of the pillow is made from soft nylon on one side and smooth cotton on the other side. 22" L x 18 1/2" W x 2" H. (12 lbs.)