Swiss Army Hawaiian Shirt Classic SD Limited Edition The Hawaiian Shirt Classic SD Swiss Army Knife by Victorinox is a Swiss Knife Shop exclusive celebrating the tropics. Beyond its unique design, the Classic SD is also an excellent and unique key holder. This miniature tool is small enough to fit in any pocket, glove compartment, handbag - anywhere. Add this iconic, festive Swiss-made multi-tool by the makers of the Original Swiss Army Knife to your collection today!