Design: Corduroy upper Foldable-heel design allows you to wear the slippers as a mule Webbing pull loops at the heel and instep achieve an easy on/off In-Shoe Comfort: 550 fill goose down insulation helps keep your feet warm and cozy Durability & Traction: Durable rubber outsole provides protection whether you're inside or outdoors Additional Details: 100% of virgin down is certified to the Responsible Down Standard Outsole made with up to 20% recycled rubber