This is a special solo-edition of the 50 Campfires : Daily Outdoor podcast. Clint digs into the nerdy science behind sleeping bag ratings. Have you ever wondered how a company decides how cold a sleeping bag is rated down to? A 20º bag? A 0º bag? We got to talking one cold night in camp, and decided that we'd eventually figure that out. Well, here it is! For more tips, tricks, recipes, gear reviews and more - visit us at: http://www.50Campfires.com Don't forget to check out the 50 Campfires : Daily Outdoor Podcast: http://bit.ly/daily-outdoor We'd love to have you join us over on Facebook as well: http://www.facebook.com/50Campfires Our monthly digital magazine is free! Claim your subscription here: http://bit.ly/50CFMag