ADVANTAGES OF REUSABLE FILTER SLOTS - Reusable and easy to replace. They help reduce plastic waste and make filter maintenance more cost-effective. FOAM POLLEN & ULTRA FINE - The foam filter blocks large particulate matter. The ultra fine filter captures smaller particles. Using them together helps provide cleaner air. CLEAN AIR FOR A HEALTHIER ENVIRONMENT - This kit is designed to help maintain cleaner air, supporting respiratory health. Color: Blue Material: Filter sponge Package Contents: 6 x Ultra Fine Filters 2 x Pollen Filters Package includes only the items listed above; other products are not included. Note: Lighting and display differences may cause slight color variations between the image and the actual item. Measurement error allowance is +/- 1-3 cm.