What Our Gearhead(R) Experts Are Saying:"I used the Vaporline Stretch Shell during a wet alpine push and it blew me away-ridiculously light, breathable, and super mobile. The stretch is legit, and it doesn't soak out thanks to that EMPEL tech. It's my go-to shell for high-output days."For summit pushes, stormy ridge traverses, and high-output missions where lightweight performance matters most, we count on the Vaporline Stretch Shell. Designed with Black Diamond's BD. dry 3L waterproof/breathable membrane and finished with revolutionary EMPEL PFC-free DWR, this jacket balances dependable weather protection with high-stretch mobility and packability. The articulated design and adjustable helmet-compatible hood allow for seamless layering over alpine kits, while underarm zips and a sleek silhouette boost ventilation without the bulk. With fully taped seams, weatherproof zippers, and two zippered hand pockets-plus the ability to pack into its own pocket-the Vaporline is our year-round mountain shell for speed, protection, and precision.