Actually the Japanese Astronaut in the ISS is wearing a silver based suit as a test to see if it reduces the smell of body odor. If you google it you can find the article about it. If I remember the article states the suit was based on silver used for hunting suits and if it works the space program was going to go with the clothing for all astronauts.

Here's a link to one story:
http://dsc.discovery.com/news/2009/03/17/odorless-space-clothes.html