Our Tier1 MERV 8 Pleated Air Filter media is twice the weight of conventional filter media. The NOVApleat design features durable, high quality, recyclable materials that hold their shape and resist minor shipping damage, without metal backing. This 100% synthetic material offers significantly higher particulate efficiency than typical poly/cotton media pleated filters, and captures the smallest and most troublesome airborne particles and allergens, such as particles that carry viruses and bacteria, pollen, mold spores, fine dust and pet dander. The combination of high efficiency, allergen reduction, and low cost make these the ideal choice for homeowners looking to improve indoor air quality on a budget.