Generally, it is about 130. At this time, we should pay attention to whether the elastic band of children's trousers is too tight, so it is best to choose loose underwear for children. Children should never wear tight underwear during their development.

Baby underwear is most suitable for pure cotton fabrics, with good water absorption, good air permeability and good warmth retention, and it is very soft and comfortable to wear next to the body. This coat is best made of cotton. Chemical fiber fabrics have poor air permeability and are prone to static electricity, which will make the skin uncomfortable.