Design: 100% recycled P.E.T. ripstop 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 the virgin down insulation certified to the Responsible Down Standard by Control union Outsole made with up to 20% recycled rubber Sizes: Medium 5-11 (whole sizes) Approx. weight (½ pair): 7.3oz The North Face Women's Nuptse Mule Slippers