98% Bacterial Filtration Efficency. Filters meet the surgical mask standard. Replacement filters for BUFF® Filter Mask. Enjoy comfort in style. Sold in packs of 30 units. Filters meet surgical mask standard EN14683:2019, Bacterial Filtration Efficiency (BFE) and Differential Pressure (breathability) Type I & II. Packed in a Clean room. Filters made in Germany by Ahlstrom-Munksjö. Perforation in mouth area to improve comfort and breathing. Designed for all-year-round. Created for versatility and protection during any kind of outdoor activities. Filter Pack BUFF® - 30 units - Adult. Pack of replacement filters designed for BUFF® Filter Mask (Adult Size). Highly breathable to ensure your comfort in daily activities. Triple-layer construction, 98% bacterial filtration efficiency, and water repellent properties. Non-reusable filters, 24 hours of maximum recommended use. Totally binder-free, latex-free, glue-free, fiberglass-free. Watch our videos to find more details on how to wear and change filters.