This lightweight jacket is not only windproof, but it's equipped with mesh-lined armpits, so you won't sweat excessively or overheat during long climbs and high-cadence efforts. It's tailored to the cycling position with its dropped rear hem, which provides an ideal fit in the drop without sacrificing coverage over your backside. it's extremely effective at blocking the wind, plus it easily packs in a rear jersey pocket when crazy crosswinds taper to a light breeze. •Shell comprised of lightweight, windproof fabric •Elastic mesh-lined armpits provide ventilation on climbs •full length zipper allows you to release excess body heat •one zipper rear pockets for extra layers and riding essentials •Dropped rear hem provides coverage in the drops •Elasticized hem and cuffs seal out the breeze •Reflective tabs enhance safety in low light or foggy conditions •Ideal for riding in windy circumstances or gliding downhill; helps keep body temperature steady