双滤罐、呼吸气阀设计，呼吸阻力极低
· 热塑材质，柔软舒适，经济可靠
· 附赠吸汗棉口鼻垫，增加佩带舒适性，可清洗更换
NP306 Half Mask
· Double filter，design of breathing to make force resistance very low
· Material：thermal plastic，soft，comfortable ，economic and reliable
· The cover that absorbs the sweat，more comfortable，easy to clean and change
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