Go further in the Smartwool PhDR Run Short Sleeve Top. Designed to tackle distances short or long, this top is constructed from merino wool and nylon to bring you superb next to skin temperature regulation and a super comfortable feel. Strategically designed sleeves mean that underarm seams are no more, and chafing disappears along with them. 360deg reflectivity offers a safer run when the sun starts to go down and mesh venting gives you breathability where you need it most. We could talk a mile a minute about all of the great things the Smartwool PhDR Run Short Sleeve Top has to offer, but we know you're eager to try it for yourself.