For years, wool was thought to be uncomfortable compared to modern synthetic and down fibers. Times have changed and wool is making a change too. Introducing Wonder Wool, a modern blend of wool and select synthetic fibers to improve comfort, loft and durability. The Sleep Philosophy Wonder Wool mattress pad features a silky soft 300 thread count sateen fully quilted cover on top of 12 ounces of polyester/ wool blended fiber in every square yard. Benefits of Wonder Wool: ' Regulates Temperature ' Breathable and Wicks Moisture ' Resilient ' Odor resistant ' Sustainable and Renewable ' Hypoallergenic ' Machine Washable ' Fits mattresses up to 15" deep Materials: 300 thread count cotton sateen double insertion face, 50gsm non-woven reverse, 8"" cloud quilting, 12"" knit skirt Filling: 12oz/y2 wool & polyester fiber (3oz/y2 wool/polyester blended (50% polyester/50% wool) + 9oz/y2 6D fiber) Product ID 76329057