Nickelodeon Bubble Fun Guppies Cotton/Polyester Sheet Set, Twin This twin sheet set is made of soft 60% cotton and 40% polyester and features the Bubble Guppie Characters This twin sheet set consists of a 39"x75" fitted sheet, a 66"x96" flat sheet and 1 reversible 20"x30" pillowcase Machine wash cold before use, non-chlorine bleach when necessary. Tumble dry low setting, remove promptly. Use warm iron when needed.