Made of 100% Cotton. A little bit country, a little bit PJ, and a little bit long johns all add up to a LOT of cozy flexibility for your little one! Everyone will get a kick out of the clever animal sayings and designs. Snug fitting with comfortable stretch, infant union suit conveniently snaps in the back and inside of legs. Print is permanently dyed into fabric and will not fade or run. Machine wash cold with like colors. Non-chlorine bleach when needed. Tumble dry low. Remove promptly. Warm iron as needed. Sizes run as follows: 6 mo, 12 mo, and 18 mo.