Portwest® Steelite Mustang Safety Boot | Steel Toe Work Boot。PORTWEST® Steelite Mustang Steel Toe Work Boots - FW69 Protective steel toecap Puncture resistant steel midsole Direct-injected dual-density construction Lightweight PU cushioned midsole Slip, fuel and oil-resistant rubber outsole 360-degree rubber external chassis system Removable EVA cushion footbed The Portwest FW69 Steelite Mustang Safety Boots are a part of the Portwest Steelite range which uses protective steel toecaps and/or steel midsoles to provide outstanding protection from high impacts and compression. These steel toe work boots are made from crazy horse leather with a TPU/ PU outsole. The 360-degree rubber external chassis system provides the user with some Achilles stability. Waterproof functionality.