The Microlight Alpine Down Jacket packs 700 fill power hydrophobic down into a zoned micro- and nano-baffle construction, so it delivers real warmth without the bulk of a heavier midlayer. A Pertex(R) Quantum shell woven with NetPlus(R) recycled fishing-net yarn keeps the whole jacket light enough to disappear into a pack, while an adjustable hood with an integrated peak and articulated sleeves add fit without adding weight. Grangers hydrophobic treatment on the down keeps that loft intact even when conditions turn damp, so the warmth holds up past a dry-weather forecast. What Our Gearhead(R) Experts Are Saying:"I packed this expecting a backup layer and ended up wearing it on its own once the sun dropped behind the ridge. The down still lofted up after I'd stuffed it in my pack all day, so I stayed warm on the hike out instead of digging for a heavier jacket."