Wind tunnel research shows that Lycra material gives less drag than bare skin or a woven material. For surfaces that hit the airflow head-on (e.g. upper arms and shins), Lycra material with a vertical ridge structure came out of the wind tunnel test the fastest. We incorporated this material into our socks to create maximum aerodynamic advantage.
Composition:
85% polyester
10% polyamide
5% elastane
The base of the sock is made from the same breathable materials as our qskin socks:
80% polymide, 20% elastane, lightweight compression socks