The Snuggledown Perfect Sleep mattress topper has a wonderfully springy, hollowfibre filling which is encased in a soft 180 thread count cotton cover. It provides your mattress with an extra layer of warmth and comfort. Lovingly hand crafted to become the ultimate sleep sanctuary, you are sure to have a perfect sleep night after night. Suitable for kingsize beds. Cover made from 100% cotton percale. 100% cotton reverse. 100% hollowfibre filling. Fitted. Secured by elasticated corner straps. Non-allergenic. Cover is machine washable and suitable for tumble drying.