Freedom of motion through simplicity and innovation. The M2 Mask is unparalleled in its class. It's lightweight and slim design features a full mesh main body construction, resulting in improved airflow and breathability to seamlessly integrate into any users job or adventure. Dominating protection and performance through its 99.9% replaceable Active Carbon Filter. The M2 is your lightweight air filtration mask, ideal for those who stay in motion. Features: Mesh Construction - Lightweight - Breathable | 99.9% Replaceable Active Carbon Filters to .1 Micron | Dual one-way discharge valves reduces condensation inside the mask | Adjustable nose clip prevents fogging | Adjustable Velcro strap allows for a more universal fit | Versatile - Durable - Washable Mainframe | Filters tested at Nelson Laboratories, USA | Includes: 1 Mask 2 Filters 1 Storage bag Sizes: Medium - (75lbs - 125lbs) Large - (125lbs- 215lbs) Extra Large - (215lbs+)