The RonHill Advance long sleeve T-shirt is ideal for running outdoors in cooler conditions or workouts at the gym. Made of Vapourlite lightweight knitted fabric, the relaxed fit T-shirt wicks sweat away from your body to evaporate on the surface. Finished with flat lock stitching to prevent irritation and reflective details for improved visibility. - A.D. Breathable long sleeved running T-shirt Vapourlite fabric to wick sweat away Lightweight and breathable design Flat locked seams to prevent irritat..