Michael Vistia Art Tee. Fabric: (Microfiber) Solar Performance Short Sleeve offers superior sun protection and performance qualities. Featuring up to UPF +50 solar protection, the Solar Performance Short Sleeve is lightweight, comfortable, and sure to keep the sun’s rays from penetrating through to your skin. This fabric is powered by PURE-tech™ moisture wicking technology. The yarn is made from 100% recycled materials, including post-consumer and post-industrial polyester fibers. The shirt will be one of the most comfortable tees you have ever owned. Choose your breed now…great gifts for yourself and your friends and loved ones!