Class A 100% cotton, 0 formaldehyde, no fluorescent agent, anti-static.Comfortable and skin-friendly, all-purpose one-piece clothing for the four seasons, baby can be nipped and gnawing fabrics after careful study to care for baby's growth, comfortable home clothing for baby, boneless sewing, no grinding of baby's skin, double care of baby's skin.The collar button and crotch button are convenient for wearing and changing diapers. Environment-friendly cartoon printing and color-matching fabrics give people a refreshing feeling.