It used to be somewhat mythical: A warm, stretchy breathable layer you could put on and leave on through high-output, stop-and-go activities in cold weather. That is, until our Nano-Air Jacket broke onto the active insulation scene and redefined how we layer in the cold. Now, another breakthrough: we've upped the recycled content throughout the Nano-Air, from the lightweight, weather-shedding shell, to the comfortable plain-weave liner, to our warm-when-wet THERMOLITE insulation - all with zero sacrifice in performance. The Nano-Air still manages variable temperatures to keep you comfortable throughout a range of conditions. The woven textured yarn face fabric is soft, supple and durable, and better resists pilling than the original. Full mechanical stretch allows for a close, athletic fit over baselayers and total range of motion. At brew stops or in frigid conditions, pull on a lightweight shell and the thermal properties of the Nano-Air skyrocket. The left-chest pocket and two above-harness handwarmer pockets all close with trim, low-bulk zippers. The center-front zipper has a storm flap and zipper garage, and the Variable Conditions Cuffs have sleek, low-bulk stretch-knit insets that allow you to easily push up your sleeves. The jacket has a DWR (durable water repellent) finish to shed moisture. Fair Trade Certified sewn.