Pure Carbon pleated AC / furnace filters are made with a durable non-woven polyester base media infused with naturally derived charcoal, created to eliminate odors in your office or home. Our pleated design provides three times as much carbon media per filter but maintains excellent air flow. Pure Carbon filters help control, absorb and neutralize odors from pets, garbage, bathrooms, smoke, cooking and other undesirable smells. They remove levels of Volatile Organic Compounds (VOCs) such as chemicals from household cleaning products. For maximum odor control, we recommend that you replace your air filter every 30-90 days.