The Sun Stripe romper is made of super soft soft bamboo/organic cotton fabric. This piece has bottom snaps that allows for easy diaper changes and is perfect for layering. Fabric: 70% Viscose from bamboo / 30% Organic Cotton Care Instructions: Machine was on low or delicate Dry on gentle/low or line dry Size Chart (Romper): Size Weight (LBS) Height (IN) 0-3 Months 8-12 lbs. 19-23 in. 3-6 Months 12-17 lbs. 24-26 in. 6-12 Months 17-23 lbs. 27-30 in. 12-18 Months 23-26 lbs. 29-31 in. 18-24 Months 26-28 lbs. 31-33 in. 2T 27-30 lbs. 33-36 in.