Class A 100% cotton, 0 formaldehyde, no fluorescent agent, anti-static.It is comfortable and skin-friendly, universal all-season one-piece clothing, which can be nipped and gnawing on fabrics for babies to grow, comfortable home clothing for babies, no bone sewing, no grinding of baby's skin, double care of baby's skin.YKK five-claw button, easy to wear and take off, breathable and fully open crotch design, convenient to wear and take off and change diapers.Add foot cover to keep baby's feet from getting cold.