Dr. Scholl's Men's Aiden Work Shoe 100% Manmade and Leather Imported Rubber sole Oil-resistant, slip-resistant Lock Step outsoletm meets SATRA TM63 and TM144 standards In independent lab testing, our shoes beat industry average for comfort and cushioning. Heeluxe Occupational Shoe Research April, 2016 Memory Foam Cool Fit and anti-compression insole Non-marking outsole Dri-Lex moisture-wicking lining and Aegis Microbe Shield control odor?