Our classic ballet flat now in super-soft premium merino wool is the perfect companion for work, play, and everything in between. Features & Design: soft and cozy, flexibly conforms to your movements, cool in the heat and warm in the cold, wicks moisture, so soft you can wear sockless, minimizes odor, machine washable, low carbon footprint, lightweight sole, wool upper, recycled laces, padded insole, Allbirds Women's Wool Breezers, Natural Black, Size 9