A trim design the Arc'teryx Accelero Pullover Zip for men is ideal as a stand alone piece or as a lightweight layer on cold morning runs. Strategically placed seams and underarm gussets increase range of motion and reduce chaffing for maximum comfort. This jacket is constructed with Dry Web fabric which is a highly breathable double-weave polyester that has built-in mechanical stretch and bamboo charcoal on the inner layer for moisture and odor control.