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850 fill down insulation
High-quality 850 fill down insulation guarantees warmth, while remaining lightweight and packable. The Nikwax hydrophobic treatment helps the down retain loft when wet and improves drying times.
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Mammut's Taiss Pro Belay IN jacket provides serious warmth when thrown on at the coldest belays. To see how it performs in real conditions, our Covent Garden store manager Alex tested the jacket during a full week of winter climbing on Ben Nevis in Scotland. Andi, our Aviemore store manager also tested the Taiss jacket out in her respective backyard. The New Year kicked off with some favourable ski touring conditions in the Cairngorms, so Andi took full advantage of the fresh snow.
Alex: At first, I was sceptical about using a down jacket in Scotland. It also looked bulky and heavy. Once I tried the product around the house, I was pleasantly surprised about how light and unrestrictive it felt. It is as light as my synthetic jacket but warmer.
Andi: I thought the jacket was super light. Maybe a bit too light even for what I wanted to use it for. Once I tried it, it felt really warm instantly with plenty of room for movement. I was very pleased with how it fitted over my shell and gloves with ease.
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Alex: The jacket really exceeded expectations. It was lighter and more packable than it looked like in the shop and the DryDown did a great job of keeping the moisture away. It did a great job trapping all the heat and keeping me toasty while waiting for my partner to climb. After a day of climbing, it was nice to have a big warm jacket over a t-shirt without having to wear multiple layers underneath.
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Alex: This jacket really impressed me with how warm it is for how light it feels. It worked faultlessly in proper Scottish winter conditions and will become my go-to for future trips. Ideal for winter climbers and mountaineers who need a proper warm belay jacket in cold conditions. It’s also great for anyone spending lots of time standing still in the cold. Warm enough to work well as an everyday winter jacket too.
It has excellent warmth for the weight thanks to the high-quality down and baffle design. Really useful pocket layout that’s easy to use with gloves. The mix of down and synthetic insulation makes it feel practical and well thought through.
Andi: I was after something lightweight, no bulk, that keeps me warm in the often-harsh Scottish conditions. So far, this jacket has ticked all those boxes.