Salomon Minim Down Sweater Review

How windproof and heat retentive is the new Quantum compared to the old one? Being a lighter version it will be less windproof. In addition, I suppose the air escapes more quickly, so you need more insulation (weight) for a given temperature rating.

Do you think that the new fabric offers real weight savings?

Depends I think :) If you're counting something to be worn in winds and stuff, then actually there has to be a strong argument for using very light coated fabrics.

Totally windproof and rather more water resistant of course. Only ~40g extra on a PHD jacket from MX to Drishell so the weight difference isn't extreme and you even get some static warmth while you're at it.

+2 degrees on the EN values for RABs sleeping bags for endurance vs quantum for instance. Suspect also a non trivial portion of why the anti freeze tested quite so warm in the recent group test.

Of course thats a fixed amount of extra warmth so sometimes the very lightest fabric lets you add enough extra down to be worth using. Or you'll be mostly sleeping in it/wearing a windshirt over the top etc etc.