The Argyle Zip is a 6-inch Mens lace-up Ankle Boot with an industrial grade Side Zip so you dont have to worry about tying up laces every day. Lace them up for a secure, comfortable fit, then leave the laces tied and use the side zips for quick, easy access. The Argyle Zip safety boot is made from premium full-grain Cowhide Leather, includes a TPU Outsole that is heat resistant to 266F, and offers Static Dissipative properties. This Water Resistant work boot is a 100% comfortable choice for Tilers, Dock Workers and Plumbers as the 200 joule safety Steel Toe Cap (Ergo Defender) offers premium toe protection. All Steel Blue boots feature our patented Trisole Comfort Technology which works to cushion your feet, knees, hips and lower back from day-to-day fatigue. Available in Medium (M) and Wide (W) fit options. Steel Blue Argyle Zip Boots are independently certified to major international safety standards and the American Standard ASTM F2413-11. The Materials: Full Grain Leather - Black: Full Grain is a waxy style Leather that is generally considered as the highest quality Leather. Our premium Cowhide Leather is sourced from a leading, environmentally responsible New Zealand tannery. Ortho Rebound Footbed: Our patented Ortho Rebound Footbed is uniquely designed to reduce foot fatigue. Made from high quality Polyurethane, it always retains its shape and thickness to ensure support from heel to toe, is antifungal, and the high wicking material keeps your feet cool and dry. Poron: Strategically placed high-tech Poron pads are placed in the sole and under your foots peak stress areas. We included Poron in our Trisole Comfort Technology, which is now the benchmark for safety boots. TPU Outsole: A durable Outsole, providing a high tolerance against cuts, abrasion, splitting and cracking, as well as a high resistance to most oils and chemicals