The 6” Sentinel HD lace up Side Zip boot is constructed with 100% full grain uppers which are chosen for their natural strength and durability. The side zip feature allows for easy on / off functionality in a lace up boot. Featuring a speed lace system so you can achieve a precise fit is the key to comfort in our new side zip lace up option. A life extending External scuff Guard allows you to work in the most extreme working conditions without beating up the toes of your boots. Utilizing double stitching on this work boot ensures that durability is at the top of our priority list when crafting this classic. Light as a feather and tough as nails this boot gets its attributes from hardworking people who wear them. TPU outsoles make this boot Electrical Hazard rated to ASTM standards.