Say goodbye to restless nights! The Aero Fit back sleeper pillow combines pressure relieving support with the ultimate in temperature regulating technologies for a cooler night's sleep. Featuring breathable, cool-to-touch Aero Fit performance fabric and temperature-regulating Cell Solution® CLIMA fill in the removable outer cover. The down alternative fill is hypoallergenic and distributed to provide consistent loft for neck support and better spine alignment.