I can be at one with the cold
The Marmot Arroyo is an excellent 30-degree sleeping bag. Truthfully, I would have preferred the Marmot Hydrogen (with its 850+ down compared to the Arroyo's 800+ down), which is a bit more expensive, but I could not purchase one with a right-side zipper. (The wife prefers a left-sided zipper, I require a right-sided zipper--together we are indeed compatible.) I tend to sleep on the warm side, so above 50 or so degrees, the Arroyo is a bit on the toasty side. My wife, who sleeps on the cold side, loves the bag at any temperature 30 degrees or higher. We found that the 30-degree rating is accurate. I would like to test the bag at under 30-degree conditions just to see how well it performs under pressure. The Arroyo is light--under two pounds. That's a very easy feature to appreciate. It really is a lot of bag for its light weight, and like all of Marmot's upper-end bags, the Arroyo is a joy to compress into a stuff sack or backpack sleeping bag compartment. Recommendations? Bring on some brighter colors! We highly recommend the bag. Eventually, we will purchase winter bags--they, too, will be from Marmot.