Designed to be the fastest sock to put on in transition with double tab construction and moisture wicking thin construction to stay blister free. The arch support promotes blood flow out of the foot and reduce fatigue. The flat toe seam construction provides superior comfort. The top is made of mesh for ventilation. The sock have a nylon heel and toe for long lasting durability and cushioned heel for impact resistance. Furthermore they have strategically placed ZoneRx padding for comfort on forefoot and instep.