When two performance fabric gurus merge, extraordinary things happen. Blending the technical wizardly of Polartec® and the damn-near indestructible nature of Cordura®, the Attack Pro short sleeved jersey redefines mountain bike apparel and sets a new standard. The Attack Pro is power by Polartec® Delta™, a cutting-edge fabric which not only wicks sweat but actually lowers your body temperature as you ride. So simply put, when it comes to hot riding conditions, this jersey outperforms the competition. Period.