While the untreated down bags on a rainy test trip became soggy, the 40-degree Ratio's feathers, which are coated with a water-repellent material, stayed lofty, even when our tent was dripping with condensation. (The water-repellent treatment on the bag's shell helped.)
We were also impressed with the innovative diamond-shaped baffles, which held the 650 fill in place and packed surprisingly small. Our only beef was with the main zipper, which, despite anti-snag panels, tended to catch when we were in a hurry.
Bottom line: A versatile, well-priced bag that best suited for wet climes. 32˚; 1.9 lbs