Razeem wrote an answer about Gore Bike Wear Xenon Bib Short - Men's on August 10, 2010
Here is a picture of the chamois-
You can also have a look and read about the chamois in the Xenon Sonic bibs on that site and look at the review in Pezcycling- the link is lower down on this webpage.
I can say this much- I have the Gore Power Bibs and the Gore Xenon Sonic (2 pairs each). I have tried many other brands but Gore is light years ahead. Quality is top notch, stitching and seams are flat and cause absolutely no irritation.
The Power Bibs are on the lower end compared to the Xenons and yet perform better than bibs at twice its price so you should expect great performance from the Xenons.
The Xenon Sonic has gel cushioning and you will not notice any impression of stitching or chamois on the outside when you wear these. I will not wear anything other than Gore gear (the jerseys are first class as well) because they have proven to be the best- comfort, functionality and quality. Oh, and I don't need to use chamois cream even on a 5 hour ride with the Sonics. Excellent chamois, perfect compression.
One last thing, when you shop at Realcyclist, you become a customer for life- best service guaranteed.