First I don't think these are jackets and certainly Berghaus don't advertise them as such. They are just long-sleeved tops, or mid-layer in hiking parlance. Perhaps there is an error in the product categorisation on Amazon? Ticks all the boxes for serious use such as as part of a layering system for winter wilderness hikes. I have also found that these work really well on their own in marginal weather as they seem to have good resistance to penetrating cold wind, e.g. an autumn beach barbecue, sun goes down, light breeze turns to cold, near gale, people return to their tents for jackets except those of us lucky enough to have Berghaus Spectrum microfleeces. They are incredibly warm and yet extremely light. On special offer these are economical enough to be bought for casual everyday wear which Is why I intend to buy loads more.