84% dobby knit recycled polyester, 16% spandex 160gsm Adapt phase change technology Quick dry, moisture wicking Speedvent active hood Integrated ergonomic facemask Adapt Phase Change fishing shirt resets the bar for the performance shirts category. Utilizing a technology called Bio Base Phase change, the Adapt Fishing Shirt will react to changes in body temperature and react in a way that will keep you dry, warm, or cool; more importantly, comfortable. This dynamic cooling and warming performance fishing shirt features make this shirt the best shirt year-round to fish in. Learn more about Phase Change technology here.Essential features include sun protection to ensures optimal sun protection, SpeedVent hood to keep your hood on at high speeds, an integrated ergonomic face mask, mesh panels, and thumbholes.