Leyoubai Easy KN95 Mask 50pcs with Breathing Valve Thickened Dustproof Industrial Gray Dust Smog KN95 Individually Packaged

Wide, high-elasticity ear straps for enhanced comfort (+36%)

Smooth stitching that does not irritate the skin

Skin-friendly, soft, and breathable fabric that does not shed fibers

Ultrasonic welding technology for upgraded material durability

Large-diameter cold flow exhalation valve that closes during inhalation to prevent dust entry and opens during exhalation to reduce breathing resistance by 45% and expel internal moisture and heat

Mechanical strength and pre-treatment tests passed with high scores (above 97%)

Inhalation resistance reduced by 7.89% compared to previous models

Effectively reduces heat and moisture accumulation inside the mask

Helps prevent mouth breathing habits by reducing breathing resistance

Meets all technical requirements of GB2626-2019 including filtration efficiency, breathing resistance, inhalation resistance, and leakage

Prevents upper jaw protrusion

Comfortable fit with improved sealing and protection

Independent packaging to avoid secondary contamination

Tested and certified by authoritative institutions

Valid until 2025

Suitable for protection against particulate matter with reliable filtration and comfortable breathing experience