It is designed to accommodate two sizes: one suitable for adults and another for children, compatible with both the Filter Mask and Tubular models.It includes 30 replacement filters for continued protection. Features Comes with a care instructions booklet for proper usage and maintenance. Features a high-quality, replaceable filter manufactured in Germany. Constructed with a three-layer composition, the filter delivers 98% Bacterial Filtration Efficiency (BFE) while ensuring exceptional breathability. Specifically engineered in Germany to seamlessly fit the BUFF Filter Mask, this single-use filter is free from both glue and latex. Provides a 98% filtration efficiency, adhering to the surgical mask standard EN14683:2019 Type I & II. Incorporates a three-layer filtration system, consisting of a melt-blown Nano fibre layer encased between two water-repellent fibre layers. Manufactured in Germany by Ahlstrom-Munksjö, ensuring premium quality. Hygienically packed in a cleanroom environment to maintain sterility. Designed for single-use, with a lifespan of up to one day, though actual duration depends on usage and environmental conditions.