Features: Single size: 17.5 x 9.5cm Anti-odor allergy disposable mask Features: Three layers of protection for effective filtering. Outer layer: non-woven material, inhibits dust and dust from degrading harmful substances. Middle layer: Melt-blown electrostatic micro-filtration layer, efficient filtration, isolation of fine particles from dust, droplets, etc., protection rate of 90% -95%. Inner layer: ultra-fine soft fiber, skin-friendly thickening and moisture-proof. Elasticity on both sides effectively reduces ear pressure. Better protection in smog, public places and offices. Main ingredients: Meltblown cloth and non-woven cloth 3 layers. Packing list: 1/10/50/100pcs Masks Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!!