Pearl iZUMi 2011 Men's IsoSeek IV Trail Running Shoe - 16110013 SKYDEX heel crash pad Full carbon rubber outsole for excellent off-road traction and mud shedding Forefoot Flex Grooves for a smooth, efficient ride NEW Ortholite  sockliner for amazing step-in comfort and long-lasting cushioning +D20Heel/Toe offset: 22.0mm/12.0mm