Newest Kids Mask Standard: GB/T38880-2020, verified testing by SGS. 5 Protective Layers: The innermost layer is a Polypropylene Spunbond Non Woven layer, which is super soft and gentle on the skin, followed by two layers of polypropylene melt-blown non woven layers with a non woven layer in between, followed by a cotton pattern layer. Adjustable Earloops: Each earloop has rings that can tighten or loosen the earloops to pull the mask tighter on the face. An adjustable strong plastic nose clip runs along the top to create seal around the nose. For Kids 2-3 years: Sized at 4.92 inches x 3.94 inches, they fit comfortably on the child's face and fit the contour of the face, Now you can take your children with you to the store, go on trips, and send them to school safely! Individually Sealed: Each mask is individually sealed in resealable bags so they are perfect to throw in your purse, backpack, or your child's pocket and they stay clean. Light and Breathable: Designed for the utmost in comfort, these masks are painless and adjustable. They offer full coverage of the nose and mouth and allow kids to play and learn freely.