Gerber Dinosaur Roar Thermal Underwear Unionsuit, Green 100% Polyester Thermal unionsuit underwear is designed to fit snug for childs safety; made of an enhanced cotton rich blend fabric  80% ring spun cotton/20% polyester; 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