I just slipped my feet into these socks as soon as I got into my tent and by the time I was fully tucked in and ready to sleep, no more numb toes.

Inspired by our athletes with a thirst for lighter, faster-climbing gear, the Advanced Mountain Kit is the most sophisticated alpine climbing system we've ever created. Our choice for sustainably made down booties are the Montane Icarus Hut Boot Style Slippers which are manufactured with 100% recycled materials. They stuff down to virtually nothing and feature a metalised fabric finish for increased thermal performance with minimal weight. If you live in a place that sees colder, wet winters, you’ll probably want to snag a pair that has more coverage if you’ll be out in the elements more frequently.Made from your choice of lightweight nylon fabric and filled with 850+ power premium goose down treated with DownTek for water-resistance, these socks are designed to keep your feet warm and comfy all night long. But if you’re going to be in more extreme temps — below 20 or even dipping below zero — you can add 25%, 50%, 75%, or even 100% more overfill to keep your feet and toes extra toasty. This will keep your booties protected, and make them easier to find when you’re ready to transition out of the ski boots. Prior to that, Mary wrote for 5280 Magazine in Denver while working as an outdoor instructor teaching climbing, kayaking, paddleboarding, and mountain biking. The Flash Booties have 850-down fill as well as a foam insole and reinforced sole like the brand’s Standard Booties.

While we wouldn’t want to hike in the snow with these on, they are perfect for that morning stroll to the local coffee house.At just 200 g, these slippers are lightweight enough to throw in your backpack without worrying they’ll take up too much space or weigh you down. This super light, high quality, 7 denier fabric showcases a ciré finish on both sides and weighs in at just . Ventum nylon cuts the wind while still allowing for excellent vapor transfer the makes the fabric highly breathable. Our team tested down and down-alternative booties and socks from the early fall to late winter in temps from -10 to 40 degrees.