Danner Men&rsquo;s Tachyon 8&rdquo; Duty Boots 100% Fabric Imported Rubber sole Shaft measures approximately 8" from arch Heel measures approximately 1" Platform measures approximately 0.75" Complete synthetic ultralight upper for superior weight savings and dry time Abrasion resistant toe cap Open cell polyurethane footbed allows for optimal airflow and comfort Danner Tachyon rubber outsole features pentagonal lugs for superior surface contact Meets US Air Force AFI 36-2903