"BALUSTERS 11" WORK" SIZE:13 and an oil slip resistant molded rubber outsole wallking and an oil slip resistant molded rubber outsole to produce an industry leading work boot Feels great all day leaving the insole dry and cool as well as a durable dual density polyurethane slip resisting outsole It's built for comfort with the J Max® Double Comfort System® that utilizes a mesh spacer foot bed cover that provides extra comfort and a healthy environment for the foot and the J Max® removable orthotic inserts with J Flex Flexible Comfort System® with Justin Jel® offers a multi density polyurethane foot bed including low density foam to cushion initial impact and provide energy return as you walk