I have yet to find a chammy that I like. I've tried almost all brands including some of PI's expensive stuff and I have not found one that hasn't caused issues on longer rides. If I go on anything longer than 2 hours I NEED to use Butt'r or I pay the price. The one chammy I had that was close was an older PI that had a real thin/more form fitting padding to it. Which makes me wonder if I'd be better suited using a Tri chammy that is thinner and drier. Any comments?