Good Material-Environmental, soft and comfortable, 3 layers of protection. One Size Fits All- 5.7inch x 3.74inch .Specially designed for children.Suitable age: 4-13 years old. Widely Applicapable- Can be applied in home, office, school, park, playground, nail salon etc., and outdoor cycling, home decorating, traveling etc. Flexible Design- Elastic band and elastic earloop offer better fit on mouth and face. Packaging includes: 100 pcs, Please contact if you have any questions during your use. Questions answered within 24 hours.