BASE-CAMP-Dust-Breathing-Mask-Activated-Carbon-Dustproof-Mask-with-Extra-Carbon-N99-Filters

PERFECT DESIGN - Anti pollution mask with adjustable nose clip, hanging Ear Design and removable hook & loop Strap, it helps effective seal and prevents fogging, keeps the mask from slipping. The image 5 show how to take accurate measurements of your head size to get your head size and make the right purchase LOW BREATHING RESISTANCE - Dual one-way discharge valves and mesh material design of the air breathing mask make air resistance smaller without sacrificing filtration. PERFECT DESIGN - Anti pollution mask with adjustable nose clip, hanging Ear Design and removable hook & loop Strap, it helps effective seal and prevents fogging, keeps the mask from slipping. The image 5 show how to take accurate measurements of your head size to get your head size and make the right purchase LOW BREATHING RESISTANCE - Dual one-way discharge valves and mesh material design of the air breathing mask make air resistance smaller without sacrificing filtration.