The Slumber Core pillow is designed with inner cores of down to provide support, surrounded by more fluffy down to ensure maximum comfort. Pacific Coast uses the finest raw materials available to produce premier, long lasting pillows. Every lot of down is carefully selected, sorted and cleaned. The unique cleaning method produces Hyperclean down. This means dust, dirt and allergens have been removed, leaving only long-lasting, fluffy down. Comes with Allergy Free Warranty and Comfort Guarantee.