I've been looking around for a good racing singlet. Unfortunately it seems like all the singlets on the market today are the same "muscle shirt" variety, which is to say that they are nothing more than loose sleeveless t-shirts with a nike or asics logo on them. I have an old Puma singlet from 2006 that I absolutely love because it is fairly tight but the back is VERY narrow and cut out--it allows your shoulders and arms to move freely without any fabric brushing up against them. A lot of women's sports bras are designed like this. I've noticed on TV that Nike's sprinters have elastic sprint singlets with very open backs, but I don't think they are available for retail (or at least I can't find them if they are). Does anyone know where I can find an "open back" singlet like this?