AVIZZZ brand black and red protector set of 4, made of nylon and polyester, combining durability and comfort. - Brand: AVIZZZ - Type: Protectors - Quantity: Set of 4 - Material: Nylon/Polyester - Color: Black/Red I bought these for my child to use for skateboarding, but they were hardly used and have been stored away. I think they would be suitable for children in the middle to upper grades of elementary school. Thank you for your interest.