The isinlive Core 400S Replacement Filter is a set of two white HEPA filters designed for the Levoit Core 400S-P Smart Air Purifier. These filters have a MERV rating of 13 and a filter life of 6 months. They are reusable and washable, making them convenient and cost-effective for maintaining indoor air quality. The filters are compatible with ADT Pulse for smart home automation and use ABS filter frame material for durability. Ideal for improving air quality in your home, these filters offer efficient filtration technology to keep your environment clean and healthy.