Michelin Steel Toe workbook did not exist until the Michelin Brothers decided to branch out and attract younger consumers to buy the quality product they produce. Using actual tread design, I incorporated the task utility of the tire tread lug design and applied it to the sole and midsole of the boot. The uppers are a brand original setting the DNA of Michelin's own footwear product line. Interestingly, years after I designed the RLX sandal for Ralph Lauren, based on his direct instructions to put an off-road trail bike tire on a foot, did I find out that the lead innovation tire designer for Michelin used that very shoe for inspiration for their advanced concepts. Cool example of cross-pollination in design!