HANES ULTIMATE – Total comfort from head to sweet little toes. HANES ZIPPIN - Zipper closure makes changing babies easy. FITS BABY LONGER – Made of a stretch ribbed fabric that moves when he or she does, Zippin playsuits fit baby longer. SIMPLE SIZING – Infant pajamas are available in four sizes ranging from 6 months to 24 months. NO-PINCH ZIPPER - Fabric backing and protective pocket keeps zipper away from baby's skin. MADE TO MOVE – Super-soft, flexible cotton/polyester/spandex fabric moves with baby while not stretching out.