Going to a Spa for the day. What to expect?

I was given a day at the spa for a gift. I am getting a massage, a body scrub and a mud body wrap.
I get massages all the time so I know what to expect there. But never had body treatments. The spa told me that they have a mainly female staff.


So what is the deal with the scrub, you wear underwear or nude like a massage? If nude how are you covered if they scrub you with wet/sandy stuff?

The photo of the mub wrap on there website showed what looked like a nude woman completely covered in a coat of mud from head to foot, do they put the mud "everywere"? How do they get it off you?