The 4D design of our adult face masks can create an easy breathing space, and reduce anti-Fogging, High Elasticity Adjustable Earrings: Equipped With M-shaped Nose Clips. 4 layers reusable face mask with filter pocket features an opening pocket for an additional filter. Insert additional filter if needed for multiple protection. Made of 100% pure cotton. Even if it is worn for a long time, it will not be uncomfortable. Easy to carry, breathable and comfortable.