The Mainstays 250 Thread Count Cotton Blend Sheet Set is made using a high quality blend of 60% Cotton and 40% Polyester. Combining the luxury, comfort and fineness of cotton with the easy care qualities of polyester that requires a minimum of ironing these sheets offer durability and convenience. Fitted sheet fits mattress up to 14 inches deep, elastic all around for a perfect fit. These comfortable, durable sheets are perfect for your bed. Let luxury become an everyday experience with the refined comfort of these 250-thread-count cotton polyester sheet set.