Have a blast running trails, climbing rocks, splashing in the streams, then do it again the very next day. Do all this without worrying about your funky feet. Features Be-Fresh with AIRCELL(tm) technology for better performance and fit. Be-Fresh(tm) is an anti-microbial fiber that offers complete freshness. AIRCELL(tm) technology is an impregnated polyester with a blend of Silver and 11 other minerals resulting in a unique fiber that is anti-microbial, deodorizing, and highly comfortable. Asymmetric dorsal ridge pad and differential cuff protection. Sweeping mesh cools foot. Ideal for backpacking. Full boot height protection with sculpted cuff cushioning. Consists of 41% merino wool, 33% polyester, 23% nylon, 3% Lycra(R). Wash inside out with dark colors, tumble dry low. Available in a 3 pair pack.