Our Nordic Pure range of furnace filters are all manufactured from high quality pleated electrostatic filter material. Positively charged to draw more particles, these furnace filters are a highly evolved progression from the standard pleated air filter. Electrostatic material does not permit the growth of bacteria which is often a problem for other filters. Buy your next furnace air filter through Filters2Go, knowing you will receive a high quality, affordable filter that will help improve your indoor air quality.