There have been many upgrades in technology over time allowing for better products from Rocky. One of the key technology changes has been in better designs. Women's Rocky 10" stock # 4090 work boot is made with a standard lacing option plus the easy on-off feature of a side zipper. An additional key comfort feature of Rocky stock # 4090 is its contoured removable EVA insole that provides direct underfoot cushioning. Another feature of Rocky 4090 is its rugged rubber lug outsole for durability. If you are looking for a rugged women's 10" uniform work boot with the dual options of lacing or zipping them as needed the Rocky 4090 work boot may have just what you are seeking. Full-grain water-resistant leather Contoured EVA insole Rubber Lug Outsole and Non-Metallic Stabilizer Side Zipper for Easy On and Off Polishable toe 10 Inches in height Goodyear® welt construction Rocky Women's Side Zipper Jump Boot FQ0004090 BLACK