Most sun protection fishing t-shirts in the marketplace are made of 100% polyester. They are hot, clammy, odor-prone, do not breathe and generally are very uncomfortable. Cotton fishing t-shirts are breathable and comfortable but do not provide effective sun protection. We invented a solution called Solar System, a breakthrough technology that gives you the effective sun protection of a polyester fishing shirt but with the comfort and breathability of a cotton fishing t-shirt. We further upped the ante by adding moisture-wicking and odor-resistant technology allowing you to stay cool, fresh and protected from the sun's harmful UV rays.