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 design of the black button for access control, the opening of crotch is convenient for wearing and changing diapers, the environment-friendly cartoon printing and collage fabric stitching give people a refreshing feeling.