Bike shorts are a very sensitive issue. They need to conform to the body and allow for a wide range of flexibility. They also need ample yet not bulky padding in the saddle area. For its Elite Bib Short, Craft used 3D construction and compression fabrics to make an even better short.
Compression fabrics apply pressure to muscles to keep them from fatiguing as you hammer your ride. 3D construction means the fabric panels designed specifically for the forward-leaning position on the bike. Yes, you can still stand up straight comfortably, but the shorts are somewhat molded to their purpose of time on the saddle.