This shirt from Nihon Uni of Japan allegedly protects its wearer from knife attacks. But be warned -- only slashes, NOT stabs. They cost anywhere from $190-$522 for short-sleeved models and $220-$590 for the long. The shirts are constructed of a ultrahigh molecular weight polyethylene fiber that's 3x the strength of cotton. Apparently they were designed to address the recent increase in knife attacks on convenience store clerks and children in Japan. If these really help then I'm all for them. However I'm going to hold out for the stab proof version myself. When the wife gets mad she doesn't get all slashy on me, she gets stabby. And, on more than one occasion, shooty.
Meshy T-shirt from Japan protects you from Knife attacks but not Shurikens [newlaunches]