Warm Sleeping Bag Liners
Does anyone use the additional warmth varieties, and do they work?
Looking at sleeping temps two weeks out from my trip, they are averaging 10-15F colder than the low of what I am used to, and flirting with my 25F bag rating. Normally, this bag gets used down to the low 40s without issue, only wearing boxers, whereas night temps are hovering around freezing now. Even though I'll have long underwear and clothes that can be slept in, I'm wondering if any liner is worth picking up to help out?