Blisters on the feet are the most common injury for long distance runners. Drymax Maximum Protection Running Mini Crew Socks combine the patented Blister Guard system and dual layer moisture removal system to greatly reduce the risk of developing blisters. The Blister Guard system incorporates Friction Free Profilen fibers throughout the entire foot area of the sock Greatly reducing heat caused by friction during long distance runs. The dual layer moisture removal system keeps your feet dry by moving liquid Such as sweat Away from your feet. Water does not stick to the inner super hydrophobic layer and is repelled to the outer hydrophilic Drymax layer Creating a barrier that keeps moisture away from the surface of your skin so your feet remain dry and comfortable. Other running socks use moisture wicking fibers that rely on the slow process of evaporation to dry And in the process Keep your feet wet. Drymax socks dry at the same speed as you sweat Keeping you on the road longer. The combination of these two patented technologies greatly reduces the risk of forming blisters. Care Instructions: Machine wash warm with like colors. Tumble dry low heat. To whiten use bleach alternative. Do not use fabric softeners As they will reduce the effectiveness of Drymax fibers. Do not use chlorine bleach As Lycra Spandex stretch fibers and MicroZap antibacterial active odor control will stop working.