Simply Pure sheets and pillowcases are free of chemicals, dyes, resins, finishes and bleaches. Rest assured that these 100% cotton sheets are good for you and the environment. Dust mites are controlled by washing sheets in hot water or by using all-temperature AllerTech Laundry Detergent. They'll soften to a silky feel with repeated washings. Each set contains one fitted sheet, one flat sheet and two pillowcases. Twin set has only one pillowcase. Extra pillowcases can be ordered. Natural cream color, 210 thread count.