CLEANER INDOOR AIR: X size-pack of MERV 11 of ARM & HAMMER™ MAXIMUM 16000™ air filters. Designed to help trap unwanted particles in your indoor air and reduce odors. HELPS TRAP AIRBORNE CONTAMINANTS: The ARM & HAMMER™ MAXIMUM 16000™ Air Filter is rated as a MERV 11, meaning it can trap up to 87% of large airborne particles. This filter effectively reduces airborne allergens, including pollen, pet dander, dust mite debris, microscopic allergens, smoke and VOCs. LASTS UP TO 90 DAYS: To maintain optimal filtration performance, check your home air filter every 60-90 days. Regularly replacing air filters helps to keep your HVAC unit running efficiently and can help reduce energy usage. PROUDLY MADE IN THE USA: Each air filter is manufactured and assembled here in the USA. Replacing or installing the filter is quick and easy! Simply follow the instructions on the packaging. To ensure proper fit, measure your current air filter for the exact size and compare it to ours.