New Balance - NB Postal (Black) - Men's: New Balance Postal approved. TP walking strike path outsole stabilizes the foot through the gait cycle. Contains a Graphite Rollbar, a biomechanical positioned piece of graphite in the midsole, which maximizes rearfoot stability. It is combined with a medial and lateral post for motion control during the gait cycle. Single density polyurethane outsole and midsole provides lightweight cushioning and resists compression set.