Allbirds Tree Runner - Women's Shoes : Kaikoura White (White) : Allbirds is a proud Certified B Corporation and sources materials that are FSC-certified. ; Introducing the Allbirds Tree Runner, a fusion of eco-chic and comfort. Crafted from responsibly sourced eucalyptus tree fiber, its silky-smooth polyester upper and lining keep your feet cool. Featuring a lace-up closure, closed toe, and cushioned midsole for all-day support, it's ideal for casual wear, walks, and sunny days. ; FSC-certified TENCEL Lyocell (eucalyptus tree fiber) upper. ; EVA insole. ; Bio-based TPU eyelets. ; Shoe laces made from recycled plastic bottles. ; ZQ merino wool heel lining. ; If you're a half size, size up. ; Machine washable, air dry. ; SweetFoam outsole made with sugarcane-based green EVA. ; Imported. Measurements: ; Weight: 7.7 oz ; Product measurements were taken using size 5, width B - Medium. Please note that measurements may vary by size. | Allbirds Tree Runner Women's Shoes Kaikoura White (White) : 6 B - Medium, Synthetic