Currently at REI outlet for $40 in every size of black or red. This is basically the MHW version of the well praised Rab Boreas. I've recently been converted to MHW so going to pick one up myself.
I'd recommend sizing up, I had grabbed one from campsaver but there's not a huge amount of stretch so it was a bit tough to get one and was already cut on the trim side. My initial impression was that it felt much more breathable and durable than my windshirt, it's basically an unlined softshell type material. So if sizing works out I'm hoping it'll be useful for climbing or bushwhacking trips in warmer months and as a winter shell in very cold weather.