Dual-density outsole releases energy with each step by absorbing and redistributing shock. HPO2 Flex cushioned triangle footbed pattern conforms to the way you walk, providing air circulation, flexibility and superior support. Burnished crust leather uppers for superior finish and refined appearance. Laser perforation detailing provides distinguishing subtle sophistication. Leather skeleton and tongue combined with textile lining whisks moisture away from the foot while keeping the wearer cool. Suede leather sock liner enhances comfort of the HPO2 Flex and provides visible quality. Molded rubber outsole provides excellent traction and durability. Material: Leather, suede.