Siser® PureHT™ is A breakthrough, eco-conscious HTV developed through a five-year collaboration with the University of Biotechnology – Padua, Italy. Unlike conventional materials that may take decades to break down, PureHT™ naturally decomposes within just six months without releasing harmful toxins or microplastics. Designed for use with ethically made natural textiles, PureHT™ combines soft, easy-to-apply heat transfer properties with environmental responsibility.