Buckles: Buckles aren't only for CGA vests. You may prefer, one, two, or no buckles at all on your vest. The nylon straps don't stretch, so the more buckles you have, the more secure the vest will fit. Some riders like the feel of an extremely flexible and thin pullover, but don't want it to ride up when they fall, so adding a buckle can be the most effective solution. The downside is that the buckles may not be as comfortable since they don't stretch and flex with you when you move.