Washable face mask made in france Washable anti-projection woven face mask with 2 layers Elastic bands behind ears Great breathability and filtration POPLIN 100% cotton Weight: 120 gsm Certification UNS 2 (DGA) Guarantee : at least 10 washes Use : The wearing duration is limited up to 4 hours Filtration: Particles Filtration efficiency of 3 μm > 70% Breathability: Test of air permeability > 96 L.m2.S-1 for a depression of 100 Pa