CHeck the manufacture's website.
www.google.com... search dmt r3 road shoes and....
voila!
http://www.dmtshoes.com/shoes_r3.htm which says:
"...Crafted of breathable nylon mesh and long-wearing Lorica, the R3 puts all the comfort and performance you expect from a technical cycling shoe into a lightweight, umistakably Italian package. The sole is constructed of polyamide fiberglass and is compatible with most pedal systems, including Look and Shimano. Available in gray, red, white, and yellow."
Google is a beautiful thing.