$50; sierradesigns.com
Francie’s Cabin, near Breckenridge, has a sauna, making it one of the most desired backcountry chalets in Colorado’s 10th Mountain Division hut system. The only downside: The sauna is out the back door and around the corner, which means you’ve got to run through ice and slush to get your sweat on. My first time at the hut, I did the sauna prance barefoot. I learned my lesson. My second time there, I packed these sticky-soled, indoor and outdoor slipper-boot hybrids. I sprinted to the sauna wearing a beanie, bikini, and booties. My toes didn’t suffer the usual burn, thanks to these 650-fill down sleeping bags for my feet, which come with thick soles, reinforced ankles, and a cordlock cinch system on the cuff. And they compress down to nothing. I won’t camp or hut-trip without them. —Sally Francklyn, Contributor, Skiing Magazine