Disclaimer: “This KN95 mask is NOT an N95 mask. For more information about KN95 masks please see the following before you purchase: /AboutKN95s”. ?High elastic ear hook?The width of the ear hook is increased to 5 mm and the elasticity is increased to 7.87inch, which will not strain your child's ear even if you wear it for a long time. And we use ultrasonic welding technology, so that the ear strap is not easy to break. ?3D cup design?children's KN95 is more in line with the shape of children's faces, moldable nose clip adjustment to ensure a good seal. 3D shape provides enough breathing space. By using water electret meltblown cloth, breathing resistance reduced by 20%, wearer can breathe easily, more suitable for children to wear. ?KN95 Children's Mask? Unfolded size is 5.51 inches x 7.08 inches, ear hook length is 3.2 inches and stretch length is 7.87 inches, suitable for children 4-10 years old. ?5-layer KN95 mask? kn95 mask for kids is made of 2 layers of non-woven fabrics, 2 layers of meltblown cloth and 1 layer of hot air cotton, KN95 masks meet GB2626-2019 respiratory protection standards, filtration efficiency > 95%, the filter system can filter out Harmful molecules such as fine particles and dust.