The best feature of the new N.A.T. Racer bibs from Santini is the Next Thermoshock core in the chamois, which is a silicone-based material that is thin and comfortable. On long rides, I could tell the difference compared to more standard pads—there was considerably less soreness in sensitive areas and fewer hotspots—making these bibs one of my favorites. The gel material keeps the bulk of the chamois down considerably, which won't get any arguments from me.
The ONDA fabric of the Lycra is made from a single panel and fits the thighs nearly perfect, but do make sure you order the right size. Like a lot of other European brands, the sizing can run small, so order the next size up if you don't enjoy an extra-snug fit. All things considered, this was one of the best bib shorts I've ever tested.
Ideal for: Racing, long endurance events.