I think this can be used for newborns up to around 6 months old. I am selling it because the timing didn't work out and I didn't use it. It has been washed once. 【Design】 White leg warmers Logo embroidery 【Material】 The detailed material is unknown, but it is designed to have a soft texture. It is gentle on a baby's sensitive skin. 【Use】 Perfect for use in cold seasons or in air-conditioned rooms. As leg warmers, they keep your feet warm while creating a cute style. - Color: White - Brand Name: c.mini - Design: Logo embroidery