Baby dunagrees in a thick, super-comfy stretch corduroy. Four great colours. Front lined for extra warmth and all that crawling wear and tear. Outside:97% cotton, 3% elastane stretch corduroy. Linings: 100% cotton. Buckles and buttons are Nickel Free! (Nickel can irritate some babies' skin). 6-12m has poppers on the inside leg. 12-18m does not. Generous fit.