Baoshunan Silicone Dust Mask, Heavy-Duty for Dusty Environments, 3202KN100 Filter Cotton Combination Set, Protects Against Particles Greater Than 0.075 Microns, Medium-Sized Main Body + 2 Pairs of 3202 Filter Cotto

Nanometer-level filtration with double 3D cotton filters for enhanced breathability

Excellent air tightness with minimum dust particle size of 0.075 microns

3-5 times increase in air intake surface for smoother breathing

Specifically designed for Asian facial features with liquid dual-component silicone molded nose and mouth mask

Made of non-toxic, harmless, odorless, and hypoallergenic material

Chin pocket design for better air tightness and support for Asian facial structure

Six-layer protection with triple defense system, filtration efficiency ≥99.97%