The Fox Racing Evo Race Bib Liner helps reduce fatigue so you can stay in the saddle longer without your muscles giving out. Fox built the Evo Race Bib around its best chamois, the Evo Race (weird coincidence?) to make those long days of hard cranking in the blistering sun less painful.
I'm fairly new to cycling, but these bibs have been great. They've ridden with me over 500 miles on a mountain bike and show absolutely no wear. This is even more impressive as I have had several hard spills on the single track. Every time, I have scrapes on my calves and arms, but have amazingly escaped with only bruises (some very ugly) where the bibs cover.
I've also been impressed with the chamois. It was a little uncomfortable at first, but after just a few rides, it got broken in and is comfortable enough to walk around as well as ride in. The longest ride I've taken is a 4-hour jaunt up a local mountain and back. Chaffing is something I worried about, but has never been a problem... not even a little bit. (I've considered running in these as my running shorts can't brag the same track record.)
Overall, I recommend these and will probably come back to Fox when it's time to purchase new shorts.
If you have been converted to riding in bibs instead of just chamois shorts you will love these bibs. Fox makes a bib for a MTBer's and you can bet that all the pros are rocking bibs under their baggies. These fit true (american sizes) and they hold everything more securely. They are pretty awesome and I would recommend these to every Enduro riders.
I am 5-10 and 148 lbs. Size small fit perfectly. unfortunately they were cut off of me by paramedics in the ER after a crash. First thing I did the next day was to order another.
This bib is an excellent option versus the very expensive one's like Giordana, for it price is an excellent value.