Compatible with Dyson Tower Purifier Pure Cool Link TP01, TP02, TP03, TP00, AM11 and BP01. Multi-layer Defense 3-in-1 High efficiency Premium H13 True HEPA filter system, including fine pre-filter, H13 Grade true HEPA filter, and high efficiency activated carbon filter. Efficient Particle Capture True HEPA technology efficiently removes microscopic particles, including dust, pollen, and pet dander. Easy to Maintain These replacement filters are washable and reusable. It is suggested to replace the replacement filters every 6 months or depending on use to keep your air purifier performing at high efficiency. Use scenarios - In bedrooms during allergy season to reduce airborne allergens. - In homes with pets to capture pet dander and improve air quality. - In living rooms or offices to maintain clean air in busy environments.