After some extensive research and testing, we're happy to release our new UPF/Surf shirts. Composed of poly/spandex blended in a mesh fabric that is stronger and slightly heavier than competitors. This means it has a higher UPF rating and doesn't balloon much when wet. Designed to be loose fit so size down if you're unsure on fit. Breathable, lightweight, and moisture-wicking properties. Wear casually, on the water, in the gym, or anywhere you like comfortable fabrics.