I am using this sleeping bag for the PCT. While I like the sizing of the product and it is very light weight, it doesn't keep me nearly as warm as my previously used 15 degree pack and this is a 10 degree pack. I am rather disappointed with the warmth factor as I am not warm at night even in 35-40 degree. My sleeping pad is rated for 15 degree temperatures and was just fine with other sleeping bags so I know that's not the problem. But, if you're just going for sizing and weight, you'll be good to go!