I ordered this in anticipation of a trip to Yellowstone and Teton in early June and Alaska in 2014.  is lighter weight (temperature wise) than expected, even with the multiple layers.  I couldn't find a good description on here about the layers, so here it goes.  There are only 2...a rain jacket with hood, and a fleece lined inner shell that is reversible.  The rain jacket is more substantial than your typical thin wind breaker as it has 2 layers.  The fleece layer would be medium to light, and it's reversible side has a pattern you can see in the pictures.

In total, the jacket is thinner than my LLBean ski parka and my guess is not as warm, but will be perfect for my southeastern VA winters, and for early mornings in Yellowstone.

And, it definitely runs on the small side through the bust; I am bigger in the bust and could not wear this (size M - i'm a full 10, sometimes 12 in the bust) with more than a light sweater underneath.  If you are thinking this is a ski parka, then I would say go with a heavier jacket, and if you want to wear bulkier items underneath then size up.  I wanted waterproof and mid-weight layers and that's exactly what this is.