The line in the HR300 description/features about EPA requirements cracks me up; EPA does not recommend the use of ozone generators and states clearly that exposure to ozone from ozone generators is harmful. I searched the EPA site quite a bit and couldn’t find anything about the use of a scent eliminating ozone generators for outdoor use. I know ozone generators do work at eliminating odors/scent. So I suppose the clothing unit works as well as those that are used in vehicles. The personal units should work especially in stationary situations; but I just wouldn’t want to expose myself to it and there is the whole adding ozone to the environment thing even though in the grand scheme of things it is a small amount. Also, ozone will damage plastic, nylon, elastic, and other synthetic materials; so I don’t know how good it would be for repeated exposure to your hunting cloths and such. So no, never, nope for me for any ozone type product.