280 gsm fleece fabric 100% polyester Anti pill (the fabric has been treated to prevent little balls (or pills) of thread appearing on the surface of the fabric) Retro-reflective sew on tape 2 band & brace Conforms to EN ISO 13688:2013+A1:2021 Conforms to EN ISO 20471:2013+A1:2016 Class 2 High Visibility RIS-3279-TOM Issue 2 - Railway use certified.