Crafted with silky-smooth, breathable eucalyptus tree fiber and a secure fitted collar, the Tree Breezer is a versatile, lightweight, and comfortable ballet flat with no break-in necessary. Features & Design: lightweight and breezy, flexibly conforms to your movements, help your feet stay cool, silky-smooth material, so soft you can wear sockless, minimizes odor, machine washable, low carbon footprint, padded insole, tree upper, bio-based eyelets, recycled laces, lightweight sole, Allbirds Women's Tree Breezers, Stony Beige, Size 9