双滤盒半面罩 Double filters half mask • 采用EPDM外壳,非常轻便,抗老化性能优越, 能与面部良好贴合 • 呼气阀用聚硅酮制成 • 配有可快速松开的调节带 • 可同时配戴眼镜 • Made from EPDM, light weight • Of good comfort, durable and tight seal • Adjustable belt • Can be worn over prescription spectacles at the same time