Heavy-duty line of footwear includes 13 models that dont require breaking in. All are made with leather uppers and acid-, oil-, and slip-resistant outsoles. Lightweight styles allow greater flexibility. Air circulating styles increase shock absorption and maximize breathability. Heel protection models provide extra support for reduced foot fatigue. Most models available in sizes 7 to 13. Some also come in sizes 8 to 14. Prices: $90 to $125.