Combining work boot durability with athletic-shoe comfort, the Excavator 8'' Waterproof FreezeFlame contains our patented iTechnology to offer the rugged durability you expect from Cat Footwear and the all-day comfort you demand. On top of that, this style contains FreezeFlame - a special outsole with unique compounding that is engineered to maintain its performance to temperatures as high as 250 degrees C and as low as -20 degrees C. Full grain leather upper. Nylon Mesh lining. Ortholite sock liner. PE midsole. iTechnology outsole. iTechnology construction.