It is made of organic Gots certified 100% cotton muslin fabric. Muslin covers can be used in the stroller, car seat, baby carrier, bed, play mat, at sea, after bath and as a breastfeeding cover. It can be used in 4 seasons with the non-sweating, ventilated vape. The patterns on the fabric are produced with organic dye and are suitable for skin contact. It does not contain chemicals harmful to baby skin. It has a soft texture for babies' sensitive skin and gets even softer after washing. It is recommended to wash at 30 degrees.