Thin wallets, slim wallets, and small, flat wallets; our line of Big Skinny wallets are extremely thin, slim, flat, and small because they are constructed of an attractive thin nylon micro-fiber material and are designed for the way most of us organize our plastic cards and cash. Both the design and material work together in helping keep your wallet thin, slim, flat, and small. And our thin nylon micro-fiber wallets are completely vegan and vegetarian. But we also now offer hybrid leather and nylon microfiber Big Skinny wallets featuring top grain cowhide on the outside and super thin nylon microfiber for the inside for the best of both worlds. New women's wallet line features the thinnest women's wallets in the world. See an example of our new leather nylon wallet..