Add a layer of warmth for the climb without sacrificing mobility. This mid-layer sweatshirt is made of premium stretch knit that's easy to move in. The design provides targeted ventilation where you need it most. Engineered fit: Seamless adidas Primeknit is engineered to enhance movement. Targeted ventilation: Body mapping identifies key heat and sweat zones by sport and season for best temperature regulation. Built-in visor: Hood has a wired, double-layer brim for protection and a personalized fit.