The Helly Hansen Loke Terra Micro Jacket packs down small enough to disappear into a backpack, but HELLY TECH Protection with fully seam sealed, 2. 5-layer construction still holds up when weather actually turns on a hike. A ripstop polyamide shell resists snags and tears through brush and rock, while underarm ventilation and adjustable cuffs, hood, and hem keep the jacket comfortable through active movement, not just protective when standing still. What Our Gearhead(R) Experts Are Saying:"A squall rolled in halfway up a ridge and I pulled this out of my pack in about ten seconds, fully expecting it to be more style than substance given how little space it takes up. It kept the wind and rain off just as well as jackets twice its size."