Men´s UA Seamless Stride Short Sleeve.Using levels of mesh mapped to your body, you get ventilation where you need it, plus the comfort of fewer seams.It´s pretty much the most comfortable thing you´ll ever train in.FEATURES:-New, softer knit fabric with engineered mesh ventilation, mapped to the places you need it most.-Nearly sew-free construction to eliminate chafing.-Material wicks sweat & dries really fast.-Reflective details for greater visibility on low-light runs.