Keen's Philadelphia 8 inch insulated composite toe work boot steadies, protects, and keeps feet comfortable with its ¾ welt construction and heel stabilizer system, KEEN Luftcell aerated PU midsole, and KEEN.POLAR TRACTION micro-cleat grip outsole. This provides a secondary source of protection when the outsole accidentally comes in contact with live electrical circuits, helping to reduce the potential of electric shock.