Allbirds Trail Runners SWT - Ultra Running Magazine。The Allbirds Trail Runners SWT for Men in size 13 boasts a solid blue color with a low top sneaker style. These athletic shoes feature cushioned, slip-resistant, lightweight, and comfortable design, making them ideal for outdoor activities such as trail running, traction, rock/foot protection. With a breathable knit and water-resistant canvas upper and a rubber outsole. Additional features: Rugged outsole grips trail. Tear-resistant ripstop mudguard protects feed from tough terrain. Snug, sock-like collar blocks debris. Best for: Trail running, traction, rock/foot protection with sneaker comfort.