I just got the Shebeest SB Ultra D Shorts. I like the way they fit and the chamois seems SUPER, but I've only ridden the most 25 miles on them so far, so I can't tell you about how they'd be for 100 miles! The most I've ever ridden at one time so far is a wimpy 40 miles. I hope to change that to at LEAST 60 this summer.