• Healthy Breathing - 5 Layer Protection, Dust Masks Disposable comes with activated carbon layer, on-woven fabric layer, double static absorption cotton and soft non-woven fabric layer. can filter out fine dust, pollen, allergies and almost 95% particles in the air, It’s suitable for cold weather, weed eating, asthma, flu shots, allergic skin and other outdoor activities.• Breathing Mask - Due to the exhalation valve which reduces heat, moisture and fogging build-up inside. The breathing valve could effectively reduce respiratory resistance, reduce heat and moisture accumulation, reducing fogging of the glasses and improve comfort.• 3D Design - M-shaped nose clip, dust mask is cut in 3D fits almost any size/shape face, High elastic ear strap has enough elasticity to make a good seal, not tight, the valve is flexible, and the breath resistance is slow, it can be also molded for proper fit.• KN95 Dust Mask - Particulate Respirator mask is made of high quality cotton and non-woven fabric, which is non-irritating and non-allergenic to the skin. Its filtration efficiency (dust-removing rate) is more than 95% for non-oily particulate matter above 0.075 microns, and the filter material is harmless to the human body.