This is the best investment I've made for a while. It's a power respirator that is comfortable, no more dust in the eyes and lungs, and no more 2 cylce fumes from the saw! I've created a thorough review of this respirator and posted it on my site. If you are bothered by dust and 2 cycle fumes you should check this out. This is rarely seen and used in the U.S. for some reason. It's the same one Flavio Favaro has been using for years.
There is no fogging because of the constant fresh air blowing down onto the face shield. This is also great for hot summer carving, keeping your face cool. If you watch the video on the post, it shows how to modify the filters so that they will filter out the saw exhaust fumes too. Here is the link to the video http://customwoodcarvings.com/2017/11/10/power-cap-power-respirator/