Serta 233 Thread Count White Goose Feather And White Goose Down Fiber Pillow (Set of 2) (King). Support your head and neck with these down and feather fiber pillows from Serta. Each hypoallergenic pillow features a medium firmness, which is the perfect amount of support if you like to sleep on your back. The pillows are filled with 90 percent white goose feather fiber and 10 percent white goose down fiber for added loft and comfort. Guard yourself against allergies with these hypoallergenic pillows, which help you get a good nights sleep every night. Designed with double stitching, each pillow is made to last, and the external 233 thread-count fabric is constructed from 100 percent cotton for added softness. Set includes two pillows Solid white 233 thread-count 100% cotton Made from 90 percent white goose feather fibers, 10 percent white goose down fibers for added loft Double-stitch self piping provides durable edges Medium firmness is perfect for back sleepers FreshLOFT process ensures that the feather/down material is clean of dust, dirt, and allergens Certified by the American Down And Feather Council Dry clean only Jumbo pillow measures 28"W x 20"L with 34 ounces of fill King pillow measures 36"W x 20"L with 44 ounces of fill We recommend that this item is fluffed at least once a week to maintain even distribution.