Stay in place; fairly comfortable
I haven't crash-tested them yet, but these elbow pads stay in place and aren't uncomfortable at all. They fit just fine under a 3/4 sleeve Endura Burner jersey. They're light, so if I were a dedicated gravity rider I might look for something heavier, but for trail riding they're exactly what I was looking for. To be fair, these are my 1st pair of hard pads- I have 661 Evos that never stay put, and don't really give much of a feeling of confidence.