REBEL Black Hawk S3 Combat Boot The Black Hawk S3 Boot is a close quarter combat work boot made from heavy duty canvas with a water-resistant coating for breathability and quick drying. The Black Hawk S3 features a steel midsole for anti-penetration, is easily removable with a quick release concealed YKK side zip and has a toe bumper for added scuff protection. The Black Hawk is ISO 20345 and NRCS approved. SKU: RE911