Amazon.com: Danner Tachyon 8。Danner Tachyon 8\" Polishable Black GTX boots offer a lightweight, athletic design built for duty performance. These tactical boots feature a waterproof and breathable GORE-TEX lining to keep feet dry in various conditions. Constructed with a polishable synthetic leather toe and a durable nylon upper, they provide a professional look with rugged durability. The speed lacing system ensures a secure, customized fit, while the Danner Tachyon rubber outsole delivers excellent traction on diverse terrain. The open-cell polyurethane footbed provides airflow and cushioning for long shifts. Measurements: • Shaft Height: 8\"