The Pearl Izumi Men's Expedition PRO Alpha Jacket is engineered for cyclists who demand elite performance in all conditions. At its core is Polartec Alpha Direct, an advanced active insulation that provides consistent warmth without bulk and allows body heat and moisture to escape before sweat builds up—ideal for high-output riding in variable weather. The ultralight stretch-woven shell is treated with PI Dry, giving you wind and water resistance without compromising breathability. Lightweight stretch woven fabric under arms and waist defines fit and allows excess heat to escape