often lacked traction, which led to foot injuries. This necessitated the need for a shoe that was specifically designed and marketed for skateboarding, such as the Randy "720", manufactured by the Randolph Rubber Company, and Vans sneakers, which eventually became cultural iconic signifiers for skateboarders during the 1970s and '80s as skateboarding became more widespread. While the skate shoes design afforded better connection and traction with the deck, skaterboarders themselves could often be identified when wearing the shoes, with Tony Hawk once saying, "If you were wearing Vans shoes in 86, you were a skateboarder". Because of its connection with skateboarding, Vans financed the legendary skateboarding documentary Dogtown and Z-Boys and was the first sneaker company to endorse a professional skateboarder Stacy Peralta. Vans has a long history of being a major sponsor of many of skateboarding's competitions and events throughout skateboarding's history as well, including the Vans Warped Tour and the Vans Triple Crown Series. As it eventually became more apparent that skateboarding had a particular identity with a style of shoe, other brands of shoe companies began to specifically design skate shoes for functionality and style to further enhance the experience and culture of skateboarding including such brands as; Converse, Nike, DC Shoes, Globe, Adidas, Zoo York and World Industries. Many professional skateboarders are designed a pro-model skate shoe, with their name on it, once they have received a skateboarding sponsorship after becoming notable skateboarders. Some shoe companies involved with skateboarding, like Sole Technology, an American footwear company that makes the Etnies skate shoe brand, further distinguish themselves in the market by collaborating with local cities to open public skateparks, such as the etnies Skatepark in Lake Forest, California. Skateboard deck Individuality and a self-expressed casual style have always been cultural values for skateboarders, as uniforms and jerseys are not typically worn. This type of personal style for skateboarders is often reflected in the graphical designs illustrated on the bottom of the deck of skateboards, since its initial conception in the mid-seventies, when Wes Humpston and Jim Muri first began doing design work for Dogtown Skateboards out of their garage by hand, creating the very first iconic skateboard-deck art with the design of the "Dogtown Cross". Prior to the mid-seventies many early skateboards were originally based upon the concept of “Sidewalk Surfing” and were tied to the surf culture, skateboards were surfboard like in appearance with little to