When your trail runs take you up into the mountains, through the swamps, and sometimes even wading across streams, you know how smelly your shoes can get. In the Merrell Men's AllOut Flash Running Shoe, long lasting Select Fresh technology naturally eliminates odor causing bacteria. Combine this with the ability to machine wash this versatile shoe, and you might be able to leave your shoes indoors after your workouts for once. The AllOut Flash's mesh and TPU upper gives you the stability your tough workouts require while still allowing your foot to breathe, while a Uni Fly midsole absorption system disperses impact and stabilizes each each step. Merrell's Select Grip outsole provides durable traction on a wide variety of terrain, gripping both wet and dry terrain while still releasing dirt and debris. This rugged shoe's 6mm drop allows for a natural running gait while still allowing for the side to side movements that are often necessary on the trail.