This is the standard when it comes to full face helmets. I used the D2 for many years and this is the evolution of that helmet. The fit is very similar. It's snug out of the box but fits just right after a few rides. The venting is awesome and is an improvement over the D2. Other features are removable pads, extra visor, and a zippered helmet bag. If you're looking for something a little less expensive check out the D3 composite.