Compressport ProRacing Socks Ultralight Run Low Cut 3D.Dots acupressure specific areas of your feet, thus stimulating Blood is better stimulated and circulates well - The 3D.Dots protect the Achilles tendon and the malleolus area. Shocks are thus easily absorbed. The 3D.Dots do not retain water and wick out moisture. Feet remain dry. The top of the sock being seamless and elastic-less, no pressure is exercised on the ankle/calf area. The ergo-formable toe piece guarantees no creasing, no foot smothering nor any compressing. Your toes are free! The ergonomic arch support activates blood flow: less toxins for optimum performance - Moreover, your strides are well balanced as your socks stay in place.