ADVANTAGES OF REUSABLE FILTER SLOTS - Reusable and easy to replace. They make filters for your machine more cost-effective and can reduce plastic waste to be more environmentally friendly.FOAM POLLEN & ULTRA FINE - The foam version is designed to capture large particulate matter. The ultra fine version is designed to capture fine particles. Use them together to help provide cleaner air.CLEAN AIR FOR A HEALTHIER LIFE - This kit is designed to help provide cleaner air for you and your family, supporting lung health.Color: BlueMaterial: Filter spongePackage Contents:6 x Ultra Fine Filters2 x Pollen FiltersOnly the above package content is included; other products are not included.Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error is +/- 1-3 cm.