An interesting development from the brand’s innovative MTNHAUS R&D team, this is a down mid layer bodymapped for maximum warmth and movement with minimum weight. All the hems are stretchfit which keeps the warmth in, while a ‘thindown’ fill and pourous outer layer means it’s highly breathable. It is a little prone to snagging as a result of that thin shell, but I’ve had this on test over the summer and autumn and it’s dealt with a huge range of temperatures. It’s not as compressible as regular down and weighs more than a fleece, but offers loads more warmth and the outer is superbly water repellant, even after a wash. There are zippered handwarmer pockets, a good chinguard and an excellent hood, but it could use a chest pocket. It scores highly on the environmental front, using majority Bluesign and ‘Madekind’ recycled materials. Weight, around 500g.
► Verdict: The warmest on test. Versatile, breathable and water resistant, but a little bulky to pack.
► Best for: Climbing or winter mountaineering.
Review by David Lintern @