The Millet Pierra Ment Hoodie splits its fabric by function instead of running one material end to end. A stretch Vueltex knit shell handles the front and sleeves, while Carvico(R) panels at the back and underarms take over where a hard skin track generates the most heat, pulling moisture away before it can slow us down. Raglan sleeves and a four-way stretch build move through a full stride and a kick turn without binding, and a silicone-gripped hem keeps the jacket in place through it all. What Our Gearhead(R) Experts Are Saying:"I've pushed a skin track hard enough to work up a real sweat, and the panels at my back and arms kept pace instead of trapping heat like a standard fleece would. I never had to stop and strip a layer halfway up."