WINDFLEX fabric blocks cold wind and wicks away excess moisture to keep your feet warm and dry. Completely covers the instep, providing better protection against wind and splashes than toe covers. Easy to put on and take off like a toe guard, but warm like a shoe cover. Smooth, wrinkle-free fit for increased aerodynamics. Stud window shape that blocks the ventilation hole of the RC soles, durable, grippy toe reinforcements for walking.