Fabrics can protect the skin from sunburn, cancer, and other effects of ultraviolet (UV) light exposure. Knowing how much protection a fabric provides can be tricky. Two new products are now available from AATCC to simplify the evaluation procedure for Ultraviolet Protection Factor (UPF). ASTM and AATCC Technical Information and Standards for UV Protective Textiles is jointly published by AATCC and ASTM D13. It provides guidance for the complete UPF verification process in one convenient, downloadable publication.