Steel Blue Southern Cross Zip Safety Boot Black. The Southern Cross Zip is one of the most popular styles in the Steel Blue range. This 150mm ankle boot is independently certified to major international safety standard and has many features to maintain ultimate safety on the work site, while keeping you as comfortable as possible. Made from premium water resistant leather, this boot has been constructed with anti-static properties to further protect you from ignition hazards in the work place. The TPU outsole is heat resistance tested to 130 degrees Celsius, and inside the sole Poron pads have been added to high stress areas, designed to keep your feet comfortable all day long. For comfort, Baltico lining wicks moisture away from the feet keeping you cooler. A scalloped collar is comfortable to wear and allows for easier movement. A quick release zip allows for easy access in and out of the boot. Specs: 200J steel cap Baltico moisture wicking lining Ortho footbed and Poron pads on the sole for foot cushioning Quick release zip Scuff cap Product code:312661 Steel Blue Southern Cross Zip Safety Boot Black