What Our Gearhead® Experts Are Saying:"When the weather turns, the Strataline Stretch is the shell I trust to keep me moving. It’s light, fully waterproof, and packs down small—but still feels durable and breathable enough for all-day missions. It’s that perfect blend of minimalist design and real mountain protection."Engineered for performance in wet and unpredictable conditions, the Black Diamond Strataline Stretch Shell Jacket offers reliable waterproof protection in a sleek, packable design. Built with BD. dry™ 3L technology, this shell combines a 30,000mm waterproof rating with 30,000g/m² breathability to keep you dry from both the elements and exertion. The 4-way stretch nylon fabric moves with you on scrambles, hikes, or climbs, while fully taped seams, a PFAS-free DWR finish, and a YKK® Conceal® zipper block out moisture. Underarm vent zips and an adjustable helmet-compatible hood enhance airflow and comfort during dynamic movement. With a slightly dropped hem for extra coverage and hand pockets that double as a stow pouch, the Strataline Stretch Shell is ready for any weather window.