Unlike other pillows that seem to flatten a little more each day, the Candice Olson White Down Pillow is built with higher quality materials and fill to give you consistent fullness each and every night. The Candice Olson White Down Pillow is made with a beautiful 233 Thread Count white down-proof fabric and filled with 550 fill power of the finest white down available. This luxurious pillow is sure to add excellent support and comfort for a much-deserved great night's sleep. The Durawash process for Down provides the cleanest Allergen-Free RDS (Responsible Down Standard) Down on the market. Our Durawash method includes multiple washes in environmentally friendly detergent and allows our company to recycle over 65 million gallons of water annually. Our Down goes through extensive testing to measure turbidity and, while 400mm+ is considered Hypoallergenic, our RDS certified Down consistently measures at 1000mm+ -, thus proving to be the cleanest down available. And as a bluesign® system partner, no harsh chemicals, detergents, or bleach is used and no detergents are ever discharged into the environment.