Good. Probably discontinued because they make injuries worse. Had them and really messed up my knee worse than if o had nothing on. They harden on impact, so it was like landing on cement instead of snow. There’s a great article explaining how they work/don’t work in boxing, to explain what is happening. When the boxing trainer has them in his boxing gloves, it protects him from the punches he’s receiving, but for the person throwing the punch, it’s like punching a cement wall. So put that technology in a knee pad. If you’re sitting still and someone hits your knee with a bat, you’ll be OK, but landing on them, again, is like landing on cement, as you’re now landing on something which turned super hard. Kind of hard to explain, but I don’t recommend them and they were expensive too.