It can be used to protect you from harmful particles, PM2.5, vehicle exhaust, woodwork and fumes. Ideal for people at risk of respiratory diseases, living in or travelling to areas with high air pollution / smoke levels.protection: non-woven outer layer + filter paper layer + skin friendly non-woven inner layer. Breathable and comfortable, low breathing resistance.There has a nose clip can be shaped to increase mask sealing effect, and avoid the fog of glasses when breathing.Material : Non-woven fabricSize:17.5cm x 9.5cm(6.89" x 3.75" Inch)About Delivery: After receiving your order, we will process the order within 2-3 working days and ship it as soon as possible. It usually takes 7 to 15 days to arrive.Tips: Please contact us directly if there is any problem of the item or shipping, we are here to service you.