It's warmer than your typical down sweater. Weighs a little more too, but a very well made jacket and stuffs into a very soft pillow. I think it's 11 oz. for a medium. I bought on in Crested Butte a few years back, asked about repairing a tear that was my fault, and they replaced it with the current version, brand new, and - get this - shipped it to me before I'd even shipped mine back. Single best warranty experience I have ever had (well Clark's gave me two pairs of shoes once). The Infinity Warranty is not to be messed with. Get it for around town if you have a better lighter down jacket. Can't have too many puffies in my mind.
They also have a "Radiant" Hoody that looks a lot like an R1 or something.