What Our Gearhead(R) Experts Are Saying: "I reach for this jacket when I want serious warmth without bulk. The 800-fill ProDown is impressively efficient, and the slim cut layers cleanly under a shell or works great on its own. It packs down tiny, moves well while hiking or skinning, and feels purpose-built for cold days where weight and mobility matter." We turn to the Summit Breithorn Jacket when lightweight warmth and performance are non-negotiable. Built by The North Face as part of the Summit Series, this jacket is designed to thrive in cold, demanding environments-whether we're moving fast in the mountains or layering up for crisp winter days closer to home. High-loft 800-fill ProDown delivers exceptional warmth for its weight, while a recycled nylon ripstop shell with a DWR finish helps fend off light snow and moisture. Raglan sleeves and underarm gussets keep movement unrestricted, and stretch-knit cuffs with FlashDry enhance comfort during high-output efforts. With multiple internal storage options and the ability to pack into its own pocket, the Summit Breithorn Jacket is a technical layer we trust when conditions turn serious.