2XU Men's Tech Vent 2 Tone Short Sleeve Top 100% Polyester Imported High Fil fabric in the front wicks moisture away from your skin, keeping you dry Hi Fil jacq fabric in the back provides even more breathability for warmer conditions Performance enhancing fit gives you freedom of movement with minimal cling and zero chafe Reflective details add a little extra visibility before dawn and after dusk 50+ UV fabric offers protections against the sun's rays