Compressport Bike High Tights Black-Red 3D.DOT: The 3D.DOTS are multidirectional and ensure maximum grip in shoes thereby preventing feet from slipping during effort. Achilles protection: The cushioning effect of the 3D.DOTS at the rear of the sock protect the Achilles tendon from friction and pressure. Hemless: Seamless and without elastic, the upper part of the sock does not compress the leg, thus relieving the pressure in that area. Thermo-Aeration: Air enters the product which prevents the sole of the foot from overheating during effort. Water-Extraction: The 3-D dots do not retain water (rain, hydration, perspiration) and facilitate its discharge. Feet stay dry.