The next major advance came in 1982, when Sims put metal edges on his snowboard so it could be used in a wider variety of snow conditions. He went on to improve and expand the sport over the years, introducing new snowboarding styles, bindings and designs.
Commodity money is a form of money with an intrinsic value. Some of the best examples of commodity money are silver and gold coins. Currency(cash) or banknotes do not have intrinsic value and are virtually worthless in itself. It only has value because society views it as a unit of exchange. This type of currency is called fiat money.
However, use-value does not automatically lead to a commodity: He who satisfies his own need with the product of his own labour admittedly creates use-values, but not commodities. In order to produce the latter, he must not only produce use-values, but use-values for others, social use-values (131). Commodities, therefore, possess a double form, i.e. natural form and value form (138). (See Use-Value vs. Exchange-Value.) The physical body of the commodity is made up of 1) the material provided by nature (e.g. linen, gold, etc.); and 2) the labor expended to create it (see Marx, Capital 133). Note that a commodity can refer to tangilble things as well as more ephemeral products (e.g. a lecture).