G-FORM knee protectors. The hard shell pads absorb impact and provide excellent protection. Used them for a Strider bike. I think they can also be used on the elbows for bigger kids. I was able to put them on my elbows as a test. For BMX, bicycles, and snowboarding too! - Type: Elbow protectors - Material: Nylon/Polyurethane - Pads: Hard shell pads - Size: S size Thank you for looking.