Well, just did a 60 miler with the Sheebeest Ultra D's and they were great. I'd been having "sitbone" pain last ride or 2 (L side only, must be just some phase because I have never had it before - and there's certainly enough padding down there! .) Anyway, that was not an issue with these shorts. I was worried the chamois might be too stiff or thick, because it does seem a little bigger than the other SB shorts I have. But it stayed in place and didn't "intrude".