NIKE Dri FIT Power UV UPF 40+ Short Sleeve Running Crew Shirt, Volt Yellow Large 100% Polyester Imported Made with underarm gussets and ergonomic seams for a natural range of motion, the Nike UV Crew Men's Running Shirt helps keep you dry and protected against UV rays. Dri-FIT UV fabric to wick sweat away and help keep you dry and comfortable while blocking out the sun's harmful rays Crew neck with interior taping for a comfortable fit Underarm gussets for a natural range of motion. Ergonomic flat-seam construction to enhance mobility and minimize chafing. Fabric: Dri Fit UV 100% Polyester