What do you call the uniforms that the characters used during the therapy...

[Jay G 17]

...sessions in “Couples Retreat”? Each of the couples in the movie had different colored ones and I was thinking about buying a set but i don't know what they are called so I can't find them online.

Here is a picture of one of those uniforms.
http://www.getthebigpicture.net/storage/prod/09/couples06.jpg