The GI Anti-Microbial Boot Socks (Irregulars, Quantity Packs) are Genuine U.S. Army Issue anti-microbial boot socks marked as irregulars — 82.5% cotton / 12.5% nylon / 5% Spandex. Silver-coated for antibacterial/anti-odor performance. Anti-static and moisture-wicking. Available in quantity packs. Marked as irregular — slight irregularities may exist but none visible to the naked eye. Sizing Note Reference the size chart. If you're between sizes or unsure, contact us with your measurements and we'll help you choose. Well-suited for military boot wear, tactical training, hiking, hunting, ranch work, and anyone wanting genuine-issue anti-microbial boot socks at an irregular-item discount. Features 82.5% cotton / 12.5% nylon / 5% Spandex Silver-coated antibacterial nylon Anti-static, anti-microbial, moisture-wicking Marked as irregular (no visible flaws) Available in quantity packs Genuine U.S. Army Issue