Fortis 115 is NW Alpine's answer to the ever-growing demand for an ultralight, ultra-strong, breathable, and highly abrasion resistant layer. Built with our proprietary blend of yarns made from Ultra High Molecular Weight Polyethylene (UHMWPE) and the highest quality nylon fibers available, we believe the Fortis 115 Short Sleeve Performance Tee to be best in its class! Best of all, it's made responsibly here in the U.S.A.