Warm, cozy ZQ Merino wool offers exceptional comfort. The cushioned midsole offers support for all-day wear. Machine-washable materials keep shoes looking like new. Driven by your feedback, the new-generation Wool Runner 2 offers refined execution without sacrificing its best-in-class comfort. Ideal for: everyday wear, strolling to the office or after-party and traveling the world. ZQ merino wool upper: an upper so soft and comfortable you can wear it all day without wanting to take it off when you get home. Enhanced durability: a more uniform overall structure that will help maintain the shape of your shoe over time, while preventing toes from slipping through. Improved fit: the next-generation Wool Runner 2 features a completely redesigned look for a more spacious fit and sleeker aesthetic. Improved fit: we've refined the entire shoe last (which is at the heart of the shoe-making process) with an anatomical shape in the heel, and a roomier toe for improved comfort and fit. The Wool Runner 2 is available in half sizes to fit most customers. If you have wide feet or prefer a looser fit to accommodate toe spacing, we suggest you go up a half size. For extra-wide feet, go one size up. Where made: Made in Vietnam. Durability Our Wool Runner has a carbon footprint of 8.03 kg CO2e. As a Climate Neutral certified carbon-neutral company, Allbirds balances its emissions by funding high-impact carbon projects. Sustainable materials : ZQ-certified merino wool upper that meets the highest standards of animal welfare, environmental protection and social sustainability SweetFoam® midsole in green EVA made from sugarcane Shoelaces made from recycled plastic bottles Castor oil-based foam insole Heel lining in ZQ merino wool SHOE CARE Remove laces and insoles. Place shoes in a delicates bag (pro tip: a pillowcase works too). Choose a gentle cycle with cold water and mild detergent. Shake off any excess water and leave to air-dry. Shoes will return to their original shape after one or two uses. Want the full refreshment experience? Exchange new laces and insoles.