Allbirds Tree Glider - Men's Shoes : Medium Grey (Light Grey) : Allbirds is a proud Certified B Corporation and sources materials that are FSC-certified. ; The Allbirds Tree Glider is fun, lightweight, and designed for those on the move. Crafted with a soft, breathable upper made from TENCEL Lyocell and recycled PET blend with lightweight midsole that provides day-to-night cushioning. The perfect fusion of athletically-inspired style and everyday comfort. ; Rubber upper, wool lining, and insole. ; Lace-up closure with pull tabs. ; Smooth interior built. ; Low-top style. ; Round toes. ; Durable rubber outsole. ; Imported. Measurements: ; Weight: 1 lb ; Product measurements were taken using size 9, width D - Medium. Please note that measurements may vary by size. | Allbirds Tree Glider Men's Shoes Medium Grey (Light Grey) : 11.5 D - Medium, Rubber