Made in the USA, the Border I 3-layer mask combines extra protection against microbes and pollutants with a soft, comfortable and breathable 3D fit. The exterior 170g polyester active weave and the interior ultra-soft cotton blend layers are machine washable, and the third layer is a replaceable PM2.5 filter inserted between the two cloth layers. The Border I mask includes tension-free ear straps, easy-slide adjustable ear buckles, a built-in nose bridge, and a dual-sided opening filter pocket for easy filter insertion and is available in 2 sizes (VL2706-S/M, VL2707-L/XL). One PM2.5 filter included. Not certified for medical use.