Inspired by the next-level warmth of our Nuptse Jacket and thanks to 550-fill down, the Nuptse Mules bring winter-long cosiness and comfort. Soles: 40% Recycled Rubber Outsole Upper: Recycled P.E.T. Ripstop Upper Insulation: 550-Fill Goose Down; Certified To The Responsible Down Standard (RDS) FEATURES UPPER: Recycled P.E.T. ripstop upper 550-fill goose down; 100% of our virgin down is certified to the Responsible Down Standard Webbing pull loops at the heel and instep for easy on/off SOLE UNIT: Durable rubber outsole for protection whether you’re inside or outdoors Foldable-heel design allows you to wear it as a mule Outsole made with up to 20% recycled rubber BENEFITS: BREATHABLE - Air can easily pass through the fabric in this garment, helping to regulate body temperature. RECYCLED MATERIAL - Helps reduce landfill waste and the use of virgin materials. DOWN FILL - Lofty down insulation maintains warmth in cold conditions. CUSHIONED - Enjoy shock-absorbing comfort over long distances.