The Buff Filter Tube is reusable and features a 3-layer, interchangeable filter system within a washable, multifunctional neck gaiter made from recycled microfiber. Its ergonomic design ensures all-day comfort. Certified filters provide a bacterial filtration efficiency of 98% and meet the performance requirements for bacterial filtration efficiency and breathability according to the European standard EN 14683:2019 for surgical masks. This revolutionary neck gaiter is designed for the winter season and is equipped with certified filters to help prevent the spread of COVID-19. Enjoy all-day comfort with its ultra-lightweight design, low breathing resistance, and comfortable fit without pressure points behind the ears. It also features HeiQ V-Block: an antimicrobial fabric treatment for the inner pocket. The product includes 5 replacement filters. While the filters are not reusable, they can be used for up to 24 hours. The duration of use depends on the application and environmental conditions.