"The Merino 125 Cool-Lite Speed T-Shirt takes icebreaker's Cool-Lite merino blend and cuts it closer and shorter, with eyelet mesh running throughout for ventilation during faster efforts. An underarm panel and flatlock seams keep friction away from the skin through a hard run, and 360-degree reflective details carry visibility into early mornings or evening miles. A slim fit and forward side seams give it a more athletic cut than a standard tee. What Our Gearhead® Experts Are Saying:""I reach for this on tempo days specifically. The mesh panels actually move air when I'm pushing pace, and the reflective details caught headlights on a pre-dawn run without me thinking twice about visibility."""