PREMIUM MEMORY FOAM insoles provide optimal comfort for all-day wear while the included free washable removeable fit inserts add an extra layer of cushion and shape to your feet for arch support and weight distribution. Series 100® 8” Side Zip Composite Toe Boots are AR-670 and AFI 36-2903 compliant and based on true U.S. sizing. This boot also augments the highly successful Series 100® line with a ASTM F2413-11 rated safety toe that meets or exceeds I/75 and C/75 Impact and Compression Resistance and EH Electric Hazard. The arch design resists wear and tear from ladders and fast-roping. The size zipper and speed lacing system allows for quick put-on and take-off. An anti-microbial lining promotes breathability and blocks odor-causing bacteria to boost the freshness and extend the life of the boots. The high-quality cattle hide suede and nylon materials will stand up over time to keep you moving.