Lightweight, breathable, and designed for warm-weather comfort, the Allbirds Men’s Tree Runner NZ delivers effortless everyday wear with a sustainable edge. From sugarcane to tree fiber to responsibly sourced Merino wool, Allbirds thoughtfully selects materials that prioritize comfort and sustainability. The ultra-soft upper keeps feet cool, dry, and comfortable throughout the day, while the flexible SweetFoam® midsole provides cushioned support. Finished with a minimalist silhouette, this sneaker is ideal for all-day walking, commuting, travel, and casual wear.