Brief:1. Soft and breathable neoprene fabric 2. Humanization design for comfortable usage 3. Replaceable filter and exhalation valves 4. Hoop and loop design for different head size
Brief:1. Soft and breathable neoprene fabric 2. Humanization design for comfortable usage 3. Replaceable filter and exhalation valves 4. Hoop and loop design for different head size 5. Metal clip adjust to nose 5. Metal clip adjust to nose
