The first-ever air-engineered and infinitely-adjustable pillow that offers you the coolest, most restorative sleep possible. Unique heat-conducting fibers in the pillow cover and shredded open-cell foam fill work together to keep your head cool and optimize your restorative sleep cycles. Since every individual has different preferences for pillow height and firmness, the pillow allows you to remove foam to achieve the perfect firmness and loft you desire.