petit main's weakly acidic baby underwear set of 2 This is a brand new, unused item! The size is 50cm, making it the perfect size for babies around 3kg. It's weakly acidic, so it's gentle on your baby's skin (*＾＾*) These are short-length undershirts that are perfect for the hot season. The natural coloring gives a gentle impression. It has a double design of snap buttons and ties to prevent slipping. The fabric is treated to maintain a weakly acidic state, protecting against external irritants. It comes with a tag inside to write your child's name. [Transparency] Opaque [Fabric Thickness] Normal [Elasticity] Yes [Lining] None [Pockets] None