The basic element of our padded socks is our proprietary THORLON acrylic yarn. It’s the result of 30+ years of research, development and testing. Cotton, wool and silk (all natural fibers) absorb moisture and hold it close to the skin of your foot; for this reason we never use 100% natural fibers. Typical acrylic yarns wick moisture away from your feet, but they tend to “flatten” and mat down after several hours of use. THORLON goes "beyond" the performance characteristics of typical acrylic yarn because it’s exclusively spun to create the highest possible combination of softness and resilience. The designs were patented by THORLO and have yet to be duplicated--wicking and durability that lasts until the day is done. The density and placement location of Thorlos protective clinically-tested padding varies by activity to make sure you have protection where you need it--not where you don’t. That’s why we have invested in the R&D of 32 different applications of our padding for 32 different activities. We know of no other brand that goes to this cost and effort to help you be at your best. We go "beyond" the normal because after 30 years of taking care of all kinds of feet for all kinds of athletes, we know you desire to go "beyond" to do the things you love. Engineered variable-density padding is our core technology and is the basis for Thorlos protective properties. This unique padding is precisely placed in the anatomical locations where the foot is subjected to repeated friction (shear), pressures and impact forces in order to provide the protection your feet need to assure maximum performance. This is how Thorlos foot protection goes "beyond" what you might expect from regular thick socks or even doubling up with two pairs of socks. Thorlos clinically-tested padding provides a highly protective buffer/gasket between your feet and the hard surfaces inside the shoes.