Briiv Yorkshire Moss One Year Replacement Filter SetBriiv uses a unique combination of natural materials to filter air. The Yorkshire moss and coconut filters capture allergens, pollen, pet dander, mould spores, viruses, and bacteria. The filters last up to 12 months. The carbon matrix filter cleans the air from harmful fine dust, household odours, chemical fumes and cigarette smoke. This filter needs to be replaced every 3 months. Each one year replacement filter set has 4 nano matrix filters so you