Used in March 2023 in southern Utah camping to a low of about 30 degrees Fahrenheit. The stuff sack indicates this 5 degree bag is meant for comfortable use from 15 to 30 degrees, and “extreme” use from 5-15 degrees. We were quite warm and comfy at 30. I purchased a left and right zip model and we used them zipped together. I found these worked really well as a double bag, but recommend practicing zipping them together at home before trying to do it in a small tent - there are a lot of zippers and it isn’t exactly obvious at first glance how they go together. The price point was my reason for buying these - most down sleeping bags that are rated to 5 degrees are $500 or more. These are less rugged and may be better for car campers or light backpacking use, but serious backpackers in very remote areas may need the durability of that pricey bag. For us, hiking to a canyon bottom for a few days, these were great. The nylon is a bit thin and you must be careful while zipping that the fabric doesn’t get stuck in the zipper. There are lots of cinch cords and a cuff around the head and neck that allow you to make a “mummy” bag if used singly, but these don’t work when made into a double bag, as the head is too wide to cinch. The head part zips off if you don’t want the hood. I like how the single bag can be worn as a kind of shawl/robe with the snaps to hold it in place, for warmth around camp. It packs small into a good quality provided stuff sack, and I appreciated the large mesh storage bag too. Definitely would recommend for the casual backpacker, it’s a great bag for the money and loved the fact that it can be zipped to another one for a double bag. I cannot speak to the warmth of this 5 degree bag below 30 degrees (the highest point on it’s “comfort” range) but it was very toasty warm at that temperature, without so much as a cool toe. Paired with Klymit insulated double sleeping pad. It was pure warmth and comfort like my own bed at home. We bought the tan/khaki color with brown interior, because it was cheaper than the darker colors. It is not white but tan, and did not show dirt as much as I had worried it would. Dirt brushes off the nylon easily. It held up just fine! We did pack the sleeping bags in their compression sacks into a larger dry bag as down clumps and doesn’t insulate if it gets wet. We encountered rain on the way down the canyon so consider how you’ll keep the bag dry in inclement weather. Very pleased with this item.