ADVANTAGES OF REUSABLE FILTER SLOTS - Reusable and easy to replace. They make filters for your machine more cost-effective and can reduce plastic waste, helping to protect the environment. FOAM POLLEN & ULTRA FINE - The foam filter blocks large particulate matter. The ultra fine filter captures smaller particles. Use them together to provide cleaner air. CLEAN AIR FOR A HEALTHIER ENVIRONMENT - This kit is designed to help provide cleaner air for you and your family, supporting respiratory health. Color: Blue Material: Filter sponge Package Contents: 6 x Ultra Fine Filters 2 x Pollen Filters Note: Light shooting and different displays may cause the color of the item in the picture to appear slightly different from the actual product. Measurement may vary by +/- 1-3 cm.