Full-grain leather/durable nylon mesh upper Full grain vamp and balance action YKK side-zipper in durable Vision pattern for easy on and off fit with hook and loop tab-stay closure Gusseted tongue to keep dirt and debris out Durable polymer speed lace eyelets Moisture-wicking air mesh lining with AEGIS antimicrobial protection FIT FOR lightweight duty where speed and readiness are the highest priority, the Vengeance SR Side-Zip utilizes YKK's extremely durable Vision zipper, allowing the wearer to get into action ASAP.