Hi,
http://www.glowdog.com/products/p00055.htm
this is my vest. It may have changed in size, but....if it's the same size.....that guy in the picture is about 5' 2". The vest doesn't breathe, but it's small enough that it's not an issue. I have been considering illuminte jackets; was hoping one of the forum members would try one and find out if the new ones breathe enough for a cyclist. Btw, the t-shirts work ok, and the amount of illuminte in them is pretty small.