INSTANT COOLING: Relief for hot sleepers. Brookstone CoolSense technology adds a cooling touch to instantly relieves heat. PLUSH DOWN ALTERNATIVE FILL: These cooling pillows for sleeping provide exceptional support for your head, neck, and shoulders. Enjoy a restful night's sleep with the perfect balance of softness and support. PERFECT FOR ALL SLEEPING POSITIONS: Comfortable support for side, back, or stomach sleepers with this cooling pillow 2 pack. EASY CARE: Machine Wash (follow care instructions). Cooling shell made of 66% polyester and 34% polyethylene. Shell: 66% Polyester, 34% Polyethylene. Fill: 100% Polyester