Disposable dust mask, pack of 10, economical type, 8812J DS1T, 1 bag (10 pieces)

The curtain-type exhaust valve expels hot air and stuffiness from exhaled breath. This dust mask is equipped with 3M™'s unique cool flow valve (exhaust valve). National certification DS1 approved product (No. TM353) Head-hanging type Average measured values: Particle collection efficiency: 98.4%, Intake resistance: 32 Pa, Exhaust resistance: 25 Pa