1. The use of environmentally friendly polyurethane sponge material, 3D split vault skeleton, the face no sense of support.
2. Light breathing anti-haze masks, unbridled breathing, not just cool, filtration efficiency
of more than 97% PM2.5, effectively blocking more than 0.3um bacteria
3. TPU stretch film composite fine sponge, the more comfortable the band,
comfortable ear hook design, strong tensile, flexible fit.
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