The original EXPED Down Sock just got better. Cold feet can be a common problem when camping in extremely cold or chilly conditions. Our lightweight, highly compressible down socks add an extra layer of insulation around your feet while inside your sleeping bag. 7 H-baffles individually filled with 700+ European Duck Down plus a snug elastic band keep warm air in and ensure your feet remain toasty warm. Down Sock weighs less than 5 ounces and can easily be stored in the foot of your sleeping bag to save space, remain close at hand, and keep clean. Down sock is the perfect complement to your sleeping bag and great for spending time in your tent but is not intended to be worn around camp.The updated version includes new colorways, improved seam design to prevent the down insulation from shifting around, and is 10% lighter in weight.