From Danner, the Men's Tachyon 8" Military Boots feature: Rough out leather and 1000 denier nylon upper Non-waterproof Designed for active-duty military US Air Force AFI 36-2903 compliant US Army AR 670-1 compliant Designed for hot weather conditions Lace up closure Unlined for breathability. Lighter weight with cool comfort in warmer temperatures, our unlined leather boots will mold perfectly to your foot Open Cell Polyurethane Footbed provides superior shock absorption with an additional layer of open cell construction for improved air circulation Nylon shank 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 Danner Tachyon outsole is 100% rubber for superior abrasion resistance and pentagonal lugs for maximum surface contact Height: 3" Weight: 26 oz per pair Imported. Styling Notes: Extended Sizes: To accommodate more people, we've made this boot in extended sizes. We recommend women select 1.5 to 2 full sizes down for correct fit.