Buff Filter Tube in Magaly Violet | One Size The new Buff Filter Tube has become an essential accessory for daily activities. Ergonomic neckwear design to be comfortable all day. Certified filters provide 98% bacterial filtration efficiency meeting the performance requirements of Bacterial Filtration Efficiency and Breathability of the harmonised European standard EN 14683:2019 for surgical masks. Powered by HeiQ V-Block - The fabric technology HeiQ V-Block protects the inside pocket fabric of the BUFF® Filter Tube from microbes and germs. It contains a biocide, based on recycled silver salt. Features  Two adult sizes available - XS/S and M/L Multiple ways to wear Reusable mask made from 95% recycled fabric Fabric is extremely lightweight and highly breathable HeiQ V-BLOCK NPJ03 antibacterial treatment applied on inside pocket