Gerber All Star Champ Thermal Underwear Two Piece, Grey Heather, 24 Months 100% Polyester Two-piece thermal underwear is designed to fit snug for childs safety and are made of an enhanced cotton rich blend fabric  80% ring spun cotton/20% polyester and label free at neck for added comfort Sleeve and ankle construction engineered to increase elasticity for a more comfortable fit Extended cuff on sleeve and ankle for a better fit, soft hand for comfort and feel and rib trim has spandex for extra strength and comfy fit Designed to fit snug for child's safety and 100% dyed ground prints included with offering Expanded size assortment: 6 Months, 12 Months, 18 Months, 24 Months in recyclable packaging