(as of Sep 01,2020 02:18:49 UTC – Details)
Two one-way discharge valves allow breathe out; The increased ventilation lets heat and moisture escape, preventing eyeglasses from fogging.
This dust -proof mask is made of premium Nylon, allowing breathe smoothly; Activated Carbon Filters protect you from dust pollution.
Soft nose pad on filters and adjustable snap-on nose clip provide a better fit; Flexible ear loop reduces rubbing on ears; Replaceable filter increases ease of use.
The mesh dust M shell and valves can be washed when they get dirty, the filter is easy replaceable, you can replace them with another new valves and filter cotton by yourself.