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So I don't know

one x waterproof outdoors jacket | Note that this needs to be waterproof, not just a cool-looking water resistant one like this (basically useless after a few minutes of heavy rain, as we discovered in the Dolomites)

Crafted from durable, water-resistant British Millerain Tekwax canvas, it features a padded laptop sleeve accommodating up to 16-inch devices, a discreet side water bottle holder, and a spacious front pocket for essentials

So now I have a Mongoose Dolomite

With a weight approaching 15kg, you're never going to be flying along, and climbing will inevitably be steady and sedate rather than speedy