Allbirds Tree Breezer - Women's Shoes : Mushroom/Mushroom Sole : Allbirds is a proud Certified B Corporation and sources materials that are FSC-certified. ; These lightweight Allbirds Tree Breezer flats provide next level comfort to your day! They're crafted with a silky-smooth, eucalyptus tree fiber and a midsole made from sustainable sugarcane. A rounded toe, slip-on style, and comfortable ballet design means no break-in necessary. ; Ribbed collar provides a perfectly secure fit. ; Easily transitions from day to night. ; SweetFoam outsole made with sugarcane-based green EVA. ; Machine washable, air dry. ; Imported. Measurements: ; Heel Height: 3 10 in ; Weight: 4.5 oz ; Product measurements were taken using size 7, width B - Medium. Please note that measurements may vary by size. | Allbirds Tree Breezer Women's Shoes Mushroom/Mushroom Sole : 8 B - Medium, Polyester