Exped Down Sock Booties Navy Medium. 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 great for spending time in your tent but is not intended to be worn around camp. Specifications for Exped Down Sock Booties: Manufacturer: Exped Color: Navy Fabric/Material: Nylon Features of Exped Down Sock Booties 7 individually-filled H-baffles prevent cold spots. Elastic internal ankle strap & top closure ensure a snug fit. Separate down-filled front baffle keeps toes warm. Extremely lightweight booties won't add significant pack or luggage weight. Attachment loop for easy storage & transport. Package Contents: Exped Down Sock Booties Exped 7640445455428: Down Sock Booties Navy Medium