Package Contents: 20 Pieces Cotton 2-Layer Reusable Anti Pollution Mask.Material:100% Cotton,Color: Blue, Size Name: Standard.Size: 22 cm x 12 cm.Always wash your hand with soap and water or sanitise them with alcohol rub before and after using the mask.Extremely lightweight and comfortable to wear.ANTI-DUST: Wearing this face mouth mask, you could be protected from dust, small particles on-air, pollen and much more.Anti-dust,anti-odor;washable and reusable..APPLICATION: This anti-dust mask is ideal for both women and men, suitable for cycling, camping, running, travel, climbing, and daily use. Protect you from fog, haze, vehicle exhaust, passive smoking, etc..