Children's masks with a bear design, featuring a 4-layer structure that blocks 99% of bacteria and viruses. - Quantity: 10 masks - Target age: Children - Structure: 4-layer non-woven fabric - BFE: 99% (Bacterial Filtration Efficiency) - PFE: 99% (Particle Filtration Efficiency - Virus Filtration) - Size: 16.5cm These are being sold because my child has outgrown them and has stopped using them. We appreciate your understanding. No claims, no returns. Thank you for looking.