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:-Soft knit fabric with engineered mesh ventilation, mapped to the places you need it most.-Nearly sew-free construction to eliminate chafing.-4-way stretch material moves better in every direction.-Material wicks sweat & dries really fast.-Generous ½ zip front makes for easy layering.-Reflective details for greater visibility on low-light runs.Fabric:- Knit.