When they say this jacket is ultralight, they are not kidding. I can ball it up into my fist and make it disappear. It comes with a tiny stuff sack which is very handy. When I am wearing the jacket, I store the stuff sack inside the little arm pocket of the jacket.

The jacket feels like it is made of tissue. But after wearing it for a bit, you soon realize that it is durable stuff. The jacket is well made. Be warned: this sizes run small. I was supposed to fit into the Medium, but went with the Large... and it was even a tight fit (but good).

I used it on a bike trip and it was excellent as a windbreak. I now take it on every trip into the mountains if I ever need that wind layer. Turns out that everyone I go with also has this jacket.

It repels light rain too.

Well made wind jacket with full zip for 2.6oz. It works & makes a good addition to a UL layering clothing system.

I bought the Backcountry shift welder and used it for the first time three weeks ago in Alaska. I hadn't really even looked at it carefully after getting it. It rained like crazy in Alaska and everything about the jacket performed well except the cuffs. There were no closures of any sort on the cuffs. Also, there is a weird black patch on the cuff. I don't know what it is supposed to do or why it's there. I also bought my daughter a women's stoic jacket and it has velcro cuff closures. How can you make a shell with no cuff closures on the shift welder? Further, the black patches soaked up water, which lead to the sleeve getting wet on the inside. In fact, because the wind blew rain sideways up the sleeves, my arms were wet to my elbows. I'd love for you to add velcro closures and get rid of the black patch, which doesn't seem to serve any useful purpose. Could you explain?

I got this jacket about 3 weeks ago and haven't had time to test it on any real hard hikes or runs, so I can't give it five stars yet, but it is very comfortable, surprisingly warm, weighs 3.2 oz (med) and has blocked a lot of wind and some light rain on my 15 minute bike commute.

I am 5'6" and 130 lbs and usually I wear small jackets, therefore I originally ordered this jacket in small and could barely get my arms inside, it was so tight in the shoulders. I now have the medium and it fits snuggly over a capilene shirt. It was very tight when I tried it on over a 200 wt fleece. I am happy with the fit since I was really looking for a windshell for windy spring days and summer mornings.

I recommend this jacket, especially if you are interested in low weight and some waterproofing, but go up at least one size (two if you are looking for an outerlayer).