The cotton and polyester Purity Sheet Set by Martex features Silverbac antimicrobial technology with silver infused threads to protect and eliminate harmful odor causing bacteria. This sheet set may be machine washed for easy maintenance in your home. The antimicrobial protection won't wash out and lasts the lifetime of the product. This 223 thread count set includes a flat sheet, all-around elastic fitted sheet, and one or two pillowcases depending on the size chosen from the available. Choose from the available solid colors to match with your current bedroom and comforter.