I have two Sanshas, one footed and one footless.  Both are grey and are cotton/lycra (not shiny), and both have suspender straps.  They are the tightest tights you could imagine.  So tight that they are difficult to get into, and even harder to get out of if I've gotten sweaty in class.  They are as form-fitting as you could wish.  

I bought them because of the suspenders - I prefer tights to unitards, but I don't like having to use a belt on regular tights.  Eventually, even tights that are held up by an external belt will start to ride down, and need adjustment, which can be awkward, depending on what I'm doing in class at the time.  

The suspenders have a downside, though.  The straps pass right over my nipples.  For a while I am stimulated (which is something of a distraction), but it can also be irritating.