This sleek jacket from Mountain Hardwear will keep you whisperlight, dry and comfortable during mountain-bound workouts. The Stimulus is made from Incite?äó printed nylon tricot with a Conduit?äó waterproof, breathable 2.5-layer laminate. zWeld?äó construction eliminates stitching and taping, which reduces weight and allows seams to stretch and still maintain waterproofness. One-handed neck cinchcord holds in warmth, while a microchamois-lined chin guard protects from zipper abrasion. Long back offers critical coverage. Features two hand pockets and a chest pocket; earphone exit hole facilitates tidy music listening. Reflective detailing on front and back increases visibility. At only 6 oz., this jacket packs up small, too.

Go ahead, work up a sweat. The REI OXT Airflyte Running Jacket uses the power of breathable, waterproof of eVent?äó fabric to help prevent the worst part of the morning run: the clammy chill. eVent fabric has a unique membrane structure that allows sweat vapor to escape to the outside of the fabric in one easy step. No matter how hard you work, overheating is highly unlikely due to this Direct Venting?äó technology. And, because you remain dry on the inside, the likelihood of an uncomfortable, post-exercise chill is eliminated. Stretch panels under arms and along sides offer an athletic fit that moves with you; key flex zones at shoulders and elbows promote natural motion. Drawcord hem seals in warmth and comfortably snugs the fit. Zippered chest pocket with headphone portal manages your music. Extended rear hem increases coverage and protects from splashes. Reflective trim enhances visibility in low light.