The Raide Thermal Dispersion Tee moves away from the evenly spaced perforation most running shirts use, concentrating the largest, densest holes down the center back, where heat builds fastest and where a vest or pack would otherwise trap it against the skin. The 115gsm Italian-knit microfiber stays cool to the touch and stretches in four directions, so the shirt moves through a full stride without binding or riding up. Reflective branding adds visibility for early or late starts when light is low. What Our Gearhead(R) Experts Are Saying:"I run with a hydration vest on hot days, and this is the first tee where the strip under my pack actually vents instead of just soaking through. I can feel the airflow specifically down my spine, not just a general looseness everywhere."