The Active Comfort Pillow is built with three chambers: on the outside you have soft, moisture-wicking hollow fibers that help move heat and moisture away from your head, while the core of 100 % duck feathers gives the steady support your neck needs. The breathable 100 % cotton cover feels comfortable on the skin and helps keep a dry sleeping climate. When it needs a refresh, just pop it in the washing machine on a 60℃ gentle cycle and into the tumble dryer, so it is clean and ready for the upcoming night. Always use a detergent without enzymes.