Mark Sharafinski Jr. is a Foot Nerd from the United States. Mark and Nick talk about why they feel natural footwear is a superior alternative for runners including those who are logging some serious mileage. They discuss footwear as a utilitarian foot protection, why eliminating foot wear technology allows you to tap in the body's natural technologies, they cover heel striking, and also finish talking about Mark's upcoming footwear reviews that he's going to be creating for TFC App.