Magnum Hi-tech Classic Amphibians Boots New Mens. Upper in full grain leather and nylon 1150 denier Lining highly breathable sweat elimination Heel and toe reinforced thermoplastic High energy absorption in the heel area Removable insole Notching sole with anti-slip Footwear Magnum were developed in response to a request on the part of &#39;FBI in Quantico, Virginia, USA, to modernize their shoes and make them more sports, read and black. Until that time the officers had worn the boots hiking &quot;Hi-Tec Sierra Lite&quot;, but the re..