I bought this for motorcycle riding in Phoenix, and it is awesome for hot weather.  Many buy it for the cold, but I bought it for the hot.  It protects against the "open oven" feeling that the bare face gets in Phoenix summers.  The air flows through the tiny holes and weaves its way past your sweat glands and cools the face exceptionally well.  It also looks like the Road Warrior.  It works great with half helmets and skull caps, since the helmet strap doesn't conflict with it very much.  Use earplugs or good earbuds for the wind roar, though, since it does basically nothing to reduce it.