Only worn twice comfy pair of flip-on shoes for indoor or outdoor wear. Black wool which can be machine washed. Great for travel. Retails for $105. From Allbirds website: Kick back in our extra cozy slip-on sneakers made with superfine ZQ Merino wool that gives you maximum comfort in a minimalist design. Best For: Walking, cooler weather, everyday wear Super Soft Material: Warm and cozy premium ZQ Merino wool provides next-level comfort Versatile Design: Wear-with-everything classic style, great for travel