ST-M40-3B half gas mask （silicone，two cartridges）
- model：ST-M40-3Brelease time：2017-07-23 20:01:09popularity：952 times to focusproduct feature：
- Unique fan - type exhalation valve, low exhalation resistance, not stuffy, more quickly exhalation chamber body moisture, heat
- One-way drainage valve, discharge specific internal steam, dry and comfortable
- High efficiency activated carbon, large absorption capacity, low resistance
- The unique design of diversion groove inside the filter box, the activated carbon agent is not wasted, and the use time is long
- The combination of elastic band and headband reduces the pressure on the head and neck and does not affect the wearing of other protective products
- Unique fan - type exhalation valve, low exhalation resistance, not stuffy, more quickly exhalation chamber body moisture, heat
- One-way drainage valve, discharge specific internal steam, dry and comfortable
- High efficiency activated carbon, large absorption capacity, low resistance
- The unique design of diversion groove inside the filter box, the activated carbon agent is not wasted, and the use time is long
- The combination of elastic band and headband reduces the pressure on the head and neck and does not affect the wearing of other protective products
