Model note. Black Diamond's product page lists the membrane, zip, hood, DWR and packability details shown here but did not publish a weight, waterproof rating or breathability figure on the date checked. Those rows are left as "not yet verified" rather than filled from unofficial sources.
The StormLine Stretch is Black Diamond’s everyday rain shell. Its stretch face fabric is the main point of difference: many lightweight rain jackets use stiffer, non-stretch fabrics.
What Black Diamond lists
- BD.dry, Black Diamond’s in-house waterproof and breathable technology.
- A stretch face fabric, which Black Diamond credits with better comfort and longer life.
- An adjustable hood sized to go over a climbing helmet.
- A coated YKK AquaGuard zip at the front.
- A PFC-free water repellent applied with EMPEL’s water-free process, on a bluesign-approved main fabric.
- It stuffs into its own right hand pocket, and a loop lets you clip it to a harness or pack strap.
What isn’t published
Black Diamond’s page didn’t give a weight, waterproof rating (mm) or breathability figure when we checked. We’ve left those blank instead of copying figures from unofficial sources. If you need a number to compare, ask the retailer or check the hangtag. Our waterproof ratings guide explains what to look for when a figure isn’t listed.
Who it suits
Hikers and climbers who move a lot in their shell and want something that packs away small, especially if a PFC-free finish matters to you.
Sources
- Black Diamond — StormLine Stretch Rain Shell (Men's) product page (manufacturer, accessed Oct 6, 2026)