WIX Filters offers a new line of air filters with NanoPro technology. Initially featured in 33 heavy-duty air filter part numbers, the technology provides higher initial efficiency and a final efficiency of up to 99.99 percent, according to the company. NanoPro green media is easily recognized and the filters come with metal or poly end caps. The filters are ideally suited for on and off-road applications, mines with fine or ultra-fine dust, construction sites and agricultural environments. Through a proprietary process, the NanoPro media features a unique fiber coating.