Apologies if this belongs in the Interchange (or some other) forum, but I thought it would be an item of interest. I just received an e-mail advertisement from Cuff art touting a new "stainless steel" wallet : "The worlds first and only patented wallet composed entirely of stainless steel, the fabric used in it's creation is also used in the making of fuel filters for Ferrari. Three times thinner than paper, but with the same strength as traditional leather, these wallets are unusually smooth to the touch, incredibly light and will never corrode. Unlike leather, woven stainless steel actually breathes and blocks radio waves, thus protecting RFID enabled credit cards from mobile scanners!" http://www.cuffart.com/stewart_stand_cufflinks.htm Bizarre. Is this just capitalizing on a trend (everything stainless) or is there really a market/need for radio wave blocking wallets?