Swiss brand Mammut make high quality alpine kit, and this lightweight hardshell is a good example. It’s a featherlight 240g, so a minimalist design shouldn’t be a surprise. You get a single chest pocket, a 1-way zip with rear storm flap, elasticated sleeves and a non-wired hood with a single adjuster at the back of the head. Seams are flat welded and there’s another adjuster at the waist, but otherwise it’s all about the performance of the fabric, which is Gore Tex Active C-Knit.
Testing in the Lakes in 100% humidity, I found this worked well as a summer waterproof. It breathed well even when working hard with a heavy backpack on, didn’t wet out and the thin fabric dried quickly when humidity improved. The sleeves are slightly tapered and offered a good range of movement. For more general UK use, I’d prefer another pocket, Velcro at the wrist, and a two-way zip on the front. The hood could use a wire at the brim to help in windy conditions, but it is helmet compatible and adjusted surprisingly well.
► Verdict: A very minimal ultralight shell for those just in case moments.
► Best for: Alpinism and summer backpacking.
Review by David Lintern @davidjlintern