Our 3-Layer Face Mask is a single-use alternative that forms a barrier between you and the surrounding environment. These disposable masks are great for repeated, short-term use, and when you may come into closer contact with people throughout the day. They are made at a pharmaceutical facility in Xiamen, China, that is overseen by our trusted StringKing team on the ground. We use the highest-quality materials available to us. The inner and outer layers are made with spun-bound polypropylene, and middle filter is made of premium melt-blown polypropylene. Both raw materials and finished masks are subject to daily quality control tests by the manufacturing facility and verification by our StringKing team. These masks are intended for general use and are not “surgical", N95, or medical-grade masks meant for a clinical setting.