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.
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