The Accumulair Carbon 14x25x1 air filter is designed to reduce unwanted odors and common airborne contaminants. Infused with 100% activated carbon, the filter has unique odor reduction technology to capture and lock-in airborne odors such as auto emissions, smoke particles, cooking odors, animal odors, and chemical fumes. The 100% synthetic media is designed to capture small airborne particles that containment your indoor air. To increase durability, the pleated media is laminated to a metal backing that is recyclable, galvanized, and corrosion-resistant. Tested to perform at the Minimum Efficiency Reporting Value of 10 (MERV 10) by an independent lab according to ASHRAE Standard 52.2. Along with odor reduction capabilities, this filter is designed to capture up to 80% of common airborne particles such as dust, lint, dust mite debris, cement dust, lead dust, standing dust, small fibers, pet dander, and other airborne contaminants All MERV data and statements are indicative of typical properties and characteristics obtainable. MERV claims are to be used as a guide for general comparison and not as a specification.