I have bought this knee and elbow guard pads for my niece to let her learn to ride scooter. I ask her to fall artificially hard on the ground with her knee bend. She did not feel any pain and uncomfortable. I ask her to knock her elbow hard on the wall. Again she has no complain on pain. She find that it is comfortable on her knee and elbow as the inside material is soft and external material is hard. It can really protect her from a great fall.