Warner Bros Superman So Super Microfiber Sheet Set, Twin 100% polyester Made in USA or Imported Superman So Super Twin Sheet set is made of 100% polyester microfiber Twin Sheet Set includes a 66"x96" flat sheet, a 39"x75"x10" fitted sheet and one reversible 20"x30" pillowcase Machine wash cold, non-chlorine bleach when necessary; Tumble dry low; Use warm iron if needed