For technical climbs in freezing conditions, this warm jacket will provide you with what you need to stay comfortable and lightweight. Loaded with 800-fill ProDown insulation, the Summit Series Breithorn Hooded Down Jacket offers you warmth without the weight. It delivers high-level warmth and compressibility while retaining its loft, even in wet conditions. And if things get too hot and sweaty, you can pack this lightweight jacket into its pocket to keep it safely out the way.