I love the Castelli Zen Due shorts. I didn't like the chamois in the Shebeest SSS, which many people rave about. But you will find many different opinions on shorts. I have tried several brands (PI, Terry, Castelli, Shebeest and a few cheap pairs) and styles before deciding that the Castelli zen due were the most comfortable for me. I wore them for a 75 mile ride with no chafing or discomfort. Unfortunately you have to try them out because what is the absolute best short in the world for someone may be the most uncomfortable for you.