Product Details With Allbirds' signature wear-all-day comfort, the Wool Runner 2 sneakers are lightweight and bouncy, designed to make any outing feel effortless. Made responsibly, this sustainability-focused pair features an FSC-certified TENCEL™ Lyocell (eucalyptus tree fiber) upper, a SweetFoam® midsole made with sugarcane-based green EVA, and a castor bean oil-based insole foam. SKU: A10805-DENABL Navy Wool Lining: Fabric lining Closure: Lace-up fastening Toe style: Round-toe Made in: Vietnam Fits true to size, take your normal size