Amazon.com: Allbirds Men。Allbirds Wool Runner Mizzle sneakers in a charcoal grey speckled finish. These weather-ready shoes feature a water-repellent ZQ Merino wool upper and a bio-based water-repellent shield to keep feet dry in damp conditions. Designed with a cushioned SweetFoam midsole made from sugarcane and a FSC-certified natural rubber outsole for enhanced traction on slippery surfaces. The interior is lined with soft, moisture-wicking wool for all-day comfort and warmth. Finished with a classic lace-up closure and signature branding on the heel and tongue.