You may be wondering what the big difference is between a double sleeping bag and a single sleeping bag. Well, to sum it up, there are a few differences that will make you switch over to a double sleeping bag! For starters, if you've just enjoyed a romantic day on the water and it's now nighttime, then you may want to continue that romance. Particularly, impossible to do if each of you is in a single sleeping bag. With a double sleeping bag, you're also able to carry more in your pack since there's only one sleeping bag taking up room in one backpack versus two. Think: You can pack more bottles of wine to enjoy that night!