Born from the need to produce the most efficient uniform boot comes the Chase 9" Side-Zip. Engineered and tested to perform for the elite law enforcement and military operators, this boot is fit with Original S.W.A.T.'s legendary lightweight build and performance standards, and is sure to deliver regardless of how challenging that next call is. Chase outsole: slip and oil resistant, non-marking rubber with siping, exceeds the ASTM F489-96 test for slip resistance. Stitched toe and heel for durability and increased service life. Custom-molded phylon EVA midsole for lightweight comfort and cradled support. Texon stability platform for lateral support and torsional rigidity. Airport friendly nylon shank for lightweight support and fatigue control. Heel flex notch for increased mobility and Achilles tendon comfort. Custom-molded thermoplastic heel counter and toe box for instant comfort and lateral support. Foam padded collar and tongue for protection and increased breathability. Removable custom fit EVA insole with PORON performance cushioning pads. Moisture-wicking lining with AEGIS antimicrobial protection. Durable brass alloy, rust proof hardware. Perforated collar for fit and breathability. YKK side-zipper for easy on and off fit with Velcro closure. Gusseted tongue to keep dirt and debris out.