Designing a great piece of performance footwear is a little like composing a piece to be played by a full orchestra. Each section of the orchestra, wind, percussion, strings, has its own unique factors to be considered. Similarly, technical footwear product brings together injection molding in its EVA midsole, compression molding in it's outsole, high frequency welding, laser cutting as well as traditional crafted cut and sew processes in its upper. A good designer needs to understand all of these processes, how they relate to the biomechanics of the foot and bring it all together in a way that you want to wear it!
Take a look at this great little video as my old friend Rob Dolan walks us through the Nike Lunar Glide+ 3. I've run in each of the previous models and this series continues to impress. Rob was my assigned mentor when I started at Nike, he taught me a ton, and he continues to do great things with the Swoosh.
Via my good friends at Sole Collector