Allbirds Tree Runner NZ - Men's Slip on Shoes : Dark Navy (Blizzard) : Allbirds is a proud Certified B Corporation and sources materials that are FSC-certified. ; ; Fresh yet familiar, the Allbirds Tree Runner NZ Sneaker has the supremely comfortable feel of the Tree Runner and a refined look that sets it apart. Luxe details include debossed branding, a sleek one-piece upper with lace-up closure, and a selection of elegant neutral colorways. Created with a soft, breathable upper made from TENCEL lyocell and lined with soft, temperature-regulating wool blend, the round-toe sneakers enhance comfort with every step. The lightweight midsole provides day-to-night cushioning, and the durable outsole is made with SweetFoam, sugarcane-based green EVA. ; EVA insole. ; Imported. | Allbirds Tree Runner NZ Men's Slip on Shoes Dark Navy (Blizzard) : 13 D - Medium, Synthetic