Shimano SH-R315 Shoe
I love these shoes. They are so light and so comfortable. Usually if you combine those two things, you are left with an under-performing shoe in terms of power transfer, but these shoes are super-stiff and all power goes straight to the pedals! There is also a non-slip thingy in the heel cup which really works well. I love doing these shoes up as tight as possible towards the end of a race, and they remain just as comfortable.