With its low-slung profile and seeded leather soles the Sierra Designs Down Mule is a household favorite for cold feet across the globe but the lightweight profile is also excellent for overnight backpacking in cold conditions--especially when paired with insulating socks. Elasticized instep straps keep the Sierra Designs Down Mules comfortably attached to your feet and help trap the warmth next to your bare toes and ankles. You'll find pricier slippers with non-skid nylon tread but Sierra Designs did it right with the seeded leather especially when you consider the wear and tear you'll save in your sleeping bag and on your tent floor.