This product contains organic cotton. Bodysuit: organic cotton. Overall: wool, polyester, other fibres. Overall lining: cupro. Machine washable. By choosing our cotton products, you're supporting our investment in the Better Cotton™ mission to help cotton communities survive and thrive while protecting and restoring the environment. This product is sourced via a mass balance system and therefore may not contain Better Cotton™. Visit bettercotton.org/massbalance for more information about mass balance.