1-Piece Dinosaur 100% Snug Fit PJs Featuring Built-In Footies with Elasticized Backs Zip-Front Design; All over Dino Graphics Ribbed Cuffs & Neckline; Covered Elastic Waistband for a Comfy Fit 100% Cotton Rib; Footies contain Polyester Machine wash Crafted in soft cotton with a cute print, this 1-piece gets him ready for bed in one easy zip! Carter's cotton PJs are not flame resistant. But don't worry! They're designed with a snug and stretchy fit for safety and comfort.