XL sizing, XL safety and XL comfort. The Mike XL has been created to offer the best standards of comfort and fit for a specific range of sizing options. It's virtually impenetrable making it an ideal choice of shoe for working with metal, whether you're welding, brazing or smelting. An integrated steel toe cap protects feet from falling pieces of metal and other objects. No compromise nitrile rubber soles resist corrosive substances and extreme temperatures. Upper: Full grain leather. Outsole: Rubber. Footbed: Hydro-Tec® Comfort insole. Fit: Normal. Sizes: 50-53.