I have noticed a lot of interest in the men's shapewear since I linked to a WSJ article last week, so I thought I'd give some details and what is it and where to buy it - the brand mentioned specifically in the article is 2(x)ist, they make things like form fitting t-shirts that help to smooth you under your clothes, like this one -
They make tank tops as well to go under your shirts, and many different kinds of underwear,
2(x)ist Pima Cotton No Show Cotton Brief Underwear
2(x)ist Bold No Show Trunk Underwear
As well as
2(x)ist Soy Comfort Trunk Underwear
and yup, you read that right, it's soy.