Happy Nanoversary! To celebrate the 15th anniversary of the iconic training shoe. Reebok set out to make the most comfortable version yet. These men's shoes have a dual-density midsole with firmer foam in the heel for stability and more responsive foam in the forefoot for comfort while running and jumping. A plush collar keeps the foot locked down and eliminates distractions. A decoupled. Metasplit outsole enhances runnability.