Certification: Oeko-Tex Class 1 Nr: 1501004 This product holds the Oeko-Tex Standard 100 certification. The Oeko-Tex label guarantees that no harmful substances, such as chemicals, are present in the fabric. Standard 100 includes four levels of certification, with criteria for baby clothing. Meaning dyes won't be absorbed through the skin, and infants and young children should be able to safely chew on fabrics.