Rubber sole. Extended Progressive Diagonal Rollbar helps control pronation, and promotes smoother transitions throughout the gait cycle. Padded tongue and collar. Buttery smooth fabric lining offers a great in-shoe feel. Removable foam insole. BioMoGo DNA midsole supplies long-lasting cushioning, and features an environmentally-friendly build that breaks down 50 times quicker at the landfill, compared to similar midsole materials.