The IsoCool Polyester Pillow Twin Pack features Outlast Certified Gold, which helps to balance your ever changing body temperature reacting to the microclimate that is created when you get into bed. Outlast thermocules create a more comfortable sleeping environment by responding to changes in temperature while you sleep, if the microclimate gets too hot thermocules absorb and draw heat away from your body, cool down too much and thermocules release heat to keep the temperature just right, Not Too Hot and Not Too Cold. The end result is a better, more comfortable sleep environment with fewer disruptions to your natural sleeping pattern. The cover is 300 thread 100% Cotton with embroidery and corded edges and is removable for easy care. Filled with luxurious RichLoft spiral spun polyester fiber and is completely adjustable for all sleeping positions. Available in standard and king sizes. Color: White.