Every serious runner needs a super-breathable shirt like this—it's light, won't chafe, and will wick sweat to keep you cooler all run long. Plus its features a technology that prevents the growth of odor-causing microorganisms. What more could you need from your running tee? Composition: 100% polyester Regular fit Soft, ultra-lightweight fabric delivers superior breathability Material wicks sweat & dries really fast Anti-odor technology prevents the growth of odor-causing microbes Dropped, shaped hem for enhanced coverage Do not iron Do not use fabric softeners