What Our Gearhead(R) Experts Are Saying: "This is the shell I grab when I want real waterproof protection without a bulky feel. It stretches well, vents heat efficiently, and stays comfortable during active movement. The clean design and packability make it easy to bring along when weather looks uncertain." When the forecast turns gray but the plan stays the same, we trust the Strataline Stretch Shell to keep us moving. Designed by Black Diamond for active days in sustained rain, this streamlined shell balances minimalist style with dependable weather protection for the mountains and beyond. Built with BD. dry(TM) 3-layer technology, the jacket blocks wind and rain while maintaining breathability during high-output efforts. Fully taped seams and a PFAS-free DWR finish seal out moisture, while underarm vents release excess heat when intensity rises. The stretch nylon fabric moves naturally with our bodies, and a helmet-compatible hood, adjustable cuffs, and slight droptail hem provide extra coverage where it counts. Lightweight and packable into its own pocket, the Strataline is always ready when conditions turn wet.