Regulite fabric Lightweight, breathable marl fabric with a quality wicking treatment Quick drying Cut and Sew construction with flat-locked seams Reflective graphics Front half-zip with lockdown puller Thumb loops Run through the winter with Ronhill Stride Thermal Long Sleeve Half-Zip T-Shirt. Designed to keep in warmth, the Regulite fabric is lightweight, breathable and wicks away sweat to keep you dry, comfortable and focused on your run. The Cut and Sew construction with flat-locked seams ensure a material that is smooth on the skin. With an adjustable half-zip opening and thumb loops.