Marmot Plasma 15 Degree. 900+ Fill Goose Down, 1 lb. 14 oz. I use it year round. It's a bit snug being a mummy bag but it has worked well for me for a couple seasons now. Only thing I would change now would be to get something in a water resistant down that is out there now to get weight to warmth ratio benefit and also get the water resistant properties of a synthetic.