The Microlight Down Jacket strips the platform down to its lightest build, trading a hood and a chest pocket for a leaner fit that disappears under a hardshell. Recycled 700 fill power down still fills a zoned micro and nano baffle construction, so the warmth-to-weight ratio holds even at this stripped-back weight. A Pertex(R) Quantum shell woven with NetPlus(R) fishing-net yarn keeps the whole piece packable enough to live in a pack until the temperature drops. Articulated sleeves and elasticated cuffs let it move freely under a bulkier outer layer without bunching. What Our Gearhead(R) Experts Are Saying:"I threw this on under my shell once the wind picked up on a ridge, and it added real warmth without making my arms feel stuffed inside two jackets. It packed back down small enough that I didn't think twice about carrying it on a day I wasn't sure I'd need it."