Prior to buying this pair of bibs, I only had a pair of low-end Pearl Izumi and Sugoi cycling shorts that I wore. Wow. What a difference. The chamois is very comfortable and I feel like I've been missing out on something for some time. The fit is a bit snug. I am 5'10" and 168# so I ordered the medium. If you have the financial means and have a similar build to me, I'd order both the medium and large and see which you like better. That's not to say that I'm displeased or uncomfortable. Far from it. I'm very happy with the fit and finish of this product. I'm not sure how useful the reflective parts on the back are since I wear a jersey over the top (as I am sure many do), but it's still a nice touch. The product seems well put together and will, hopefully, last for a long time. It was a very hot summer here in Austin so I had ample opportunity to test the effectiveness of the Cold Black technology. Honestly, I couldn't tell that much of a difference. Yes, my legs and lower body were slightly cooler, but I was hotter above my waist where the bibs provided support (by covering up flesh) that is lacking in a plain cycling short. A trade-off, perhaps, but I was still pretty hot when I'd get home from work and it was 100+ outside. All in all, this was a STEAL at $99 and I'm happy that I spent the money.