Top quality full grain leather is used the most technologically advanced Ladies Motorcycle Biker Engineer boot ever. Great classic look of 13 inch engineer biker boot (13 inches from heel to top, full 11 inch leather shaft). Good Year Welt Construction boots (needed for long term durability, resole-able, better comfort when wore in). This is the most technologically advanced ladies biker boot built for durability, comfort, long-term wear ability and protection.