Very good preowned condition allbirds Women's Tree Runner Shoes Size 7. Our breathable, silky-smooth sneaker made with responsibly sourced eucalyptus tree fiber treads lightly in everything you do. Best For: Walking, warmer weather, everyday wear. Thermoregulating Material: Lightweight, breathable eucalyptus fiber provides next-level comfort. Versatile Design: Wear-with-everything classic style, great for travel.