Description Leather and Perspair® Upper: The leather upper has side panels made of Perspair®. PU-coated nylon thread is woven to create a material that is extremely lightweight and breathable while remaining incredibly durable. Mesh Lining: Lightweight and breathable for total foot comfort. USAF Optional Wear: Meets US Air Force AFI 36-2903 requirement for optional wear. US ARMY Optional Wear: Meets US Army AR 670-1 requirements for optional wear. Removable Open Cell Polyurethane Footbed: Our polyurethane footbed provides superior shock absorption with an additional layer of open cell construction for improved air circulation. Resurge Midsole: The lightweight EVA midsole provides comfort and energy return for agility and fast-paced movement. Vibram® Resurgent Outsole: Large pentagonal lugs provide stability and multi-directional traction for enhanced agility. Opanka Stitch: The wrap-around Opanka Stitch bolsters the platform of the boot. How It Fits: The DLE-01 last was designed to be an extension of the foot with superior forefoot and heel capture, stability and a more anatomical shape for comfort. The additional space in the toe box allows the foot to naturally react when bearing a heavy load or changing directions laterally in high intensity environments.