For super huggable animals and downright heavenly pillows. Royal SilkTM luxury fiber fill is soft as down and provides a silky and smooth texture. Using virgin bright white siliconized polyester, it makes a perfect hypo-allergenic down alternative fill. Pillows made with Royal SilkTM will have the “karate-chop” look and feel, often desired by decorators. Non-Toxic Slick Gel Fiber.