Gore Running Wear Men's Mythos 4.0 Singlet 100% POLYESTER, MESH: 100% POLYESTER Imported Lightweight, breathable men's running top designed to keep you cool Lightweight, breathable men's running top designed to keep you cool. Comes with the 360 degrees reflex design to secure your visibility from all angles. Slim fit Mesh inserts for better ventilation Flat-lock seams Flat-lock seams with reflective print Reflective print on shoulders