I got these as a meditation mat (folded over). I haven't used them as a sleeping bag. The blue is prettier in the picture - the bag is actually a darker blue.
This sleeping bag had PLENTY of room for my husband and I (we're both about 5'8", 165 and 175). It was warm, but I don't know if a 0 degree rating is accurate. Yes, we're from Southern California and NOT accustomed to real cold, but it was in the high 30's overnight and my legs and feet were cold. My upper body, with a long sleeve shirt and a hoodie was warm, but long underwear and socks were not enough for my legs and feet. If you're 'tougher' than us Californian's in cold weather, this might be ok for you. It's definitely VERY comfortable and big! We paired this with the Kamp-Rite Double Kwik Cot and they fit together perfectly! VERY glad I spent the extra $10 and went for the warmer one.
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