4LR™ technology provides lightweight support and stability Removable All Day Cushioning insole FLX Foam™ midsole has a light springy feel that cushions every step Oil- and slip-resisting Duratread™ sole for maximum wear resistance, passes hot contact test at 300°C/572°F Flat-bottom sole is not ladder-friendly Lightly padded collar and tongue top ASTM F2892 EH rated