Allbirds Women's Tree Breezers in Hazy Indigo Machine Washable Outer Hand Wash Insole Lightweight, breathable, and effortlessly sleek, the Tree Breezer is your go-to flat. Day-to-night, warmer weather, everyday wear Lightweight, breathable eucalyptus fiber provides next-level comfort Wear-with-everything classic style, great for the office Sustainable Materials: • FSC-certified TENCEL ™ Lyocell (eucalyptus tree fiber) upper • SweetFoam® midsole made with sugarcane-based green EVA • Castor bean oil-based insole foam Size: 10 Condition: Excellent