Category 1 of this mask allows filtration greater than 90% - tested 50 washes according to MBS AFNOR SPEC S70-001.
For the purists here are the detailed characteristics:
High intensity: air permeability > 300l/m²/s
Brushed knit 85% Polyester - 15% Elastane
Usable 4 hours.
WASHABLE 50 times.
Consult the dedicated documentation on the manufacturer's official website
The production is 100% French.
It is made from a material that provides good ventilation.
Equipment intended for use by the general public and professionals.
Sale price in store: 23€ including tax