Full grain leather / Cordura 1000 denier nylon upper for improved durability and comfort YKK side-zipper in durable Vislon pattern for easy on and off fit with hook and loop closure Foam padded collar and tongue for protection and increased breathability PU collar for easy cleaning Gusseted tongue to keep dirt and debris out Durable brass alloy, rust proof hardware Time tested, and operator approved, the Classic 9 SZ Safety Plus delivers the safety and performance features you rely upon to get the job done. Confidently take on the hazards of any environment knowing that this boot is equipped with a non-metallic LENZI board for your protection.