Women's CEPA(R) Progressive+ Run Socks 2.0 :: CEPA(R) Progressive Compression Run Socks help you break through the wall that hits you when you push yourself to the limit. The progressive compression technology, which has been scientifically proven to increase circulation by up to 40%, helps you will feel lighter on your feet, and less fatigued no matter the distance. CEP's high-tech compression fibers and toe-box elasticity, form a barrier between you and your shoe. The socks mold to your feet like a second-skin, giving you a superior shoe fit with guaranteed blister prevention and wearing comfort. Built in air-conditioning allows air to flow through the ribbed pattern on the front of the shin. Air will hit moisture that has been pulled from the surface of your skin and reduce skin temperature up-to 6 degrees Fahrenheit.