Product Details Allbirds looks to vintage sneaker models to create the Courier sneakers, made from natural materials for a better future. This throwback style focuses on premium all-day comfort and has a carbon footprint of 4.11 kg CO2e, featuring 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: A10798-DGNBNW Black Fabric Lining: Fabric lining Closure: Lace-up fastening Toe style: Round-toe Made in: Vietnam Fits true to size, take your normal size