Ultra Comfort, snowy Down, and Northern Trek. I wanted to look at the each sleeping bag carefully. For Snowy Down had the highest rating. But in some ways, the other two sleeping bags were bet:er of the three sleeping bags. the snowy Down was the warmest, but it was also the most expensive. The Northern Trek cost less than the snowy Down, but it was just as expensive as the Ultra Comfort. The Ultra Comfort was warmer than the Northern Trek. Finally, the Ultra Comfort was lighter than the other sleeping bags, so it was easier to carry. I decided not to get the Northern Trek for camping outside. It wasn't as warm as the other sleeping bags. But we were having a mild winter, so I didn't need the warmest kind of sleeping bag. So I looked more closely at the lightest sleeping bag, the Ultra Comfort. That's the one I chose.