I like the carbon fiber weave on top, obviously.
The Rudy Project Windmax is a relatively expensive road helmet at $299, but has all the refinements you'd expect at that level. 22 vents keep things very airy, and if it fits you, it's a comfortable lid. For those who race in aero helmets, the price will be hard to justify. But those who train AND race in standard road helmets would do well to consider the Windmax.
The Specialized S-Works TT is a new version of the McLaren TT helmet they announced in 2012. The S-Works TT is easier to purchase, Snell / CPSC certified allowing it to be used in more competitions, and offers several new features. In our review, we discuss this helmet in depth, and share our opinion of it.