Broad Square Steel Toe. Super-Knit Moisture-Wicking Breathable Nylon Lining. Removable Orthotic Airflow Open Cell PU Insert with Moisture-Wicking Cover, Breathable from Toe to Heel, Anti-Bacterial, Anti-Fungal and Machine Washable. Tempered Steel Shank. Welt Construction. Oil-Resistant Rubber and Cork 5/8'' Heel Cap. ''Tractioneer'' Oil And Slip-Resistant Polyurethane Outsole.