
Introducing our lightest 800-fill down insulated jacket ever, this new highly packable, infinitely lightweight jacket defines warmth without the weight. Combining high loft down insulation with Pertex® 10 denier nylon ripstop fabric, this tech-laden Summit Series® jacket is designed for peak baggers focused on all-out, alpine-style summit attacks. Denier is a unit of measure for the linear mass density of fibers – the higher the denier, the thicker the fiber. Trust us when we say 10 denier is extremely svelte.