The key to the comfort and snug fit of the Prologo 15 Cycling Socks is the combination of 200-needle construction and Meryl® Skinlife yarns. The extra-stretch of the 200-needle construction gives a wonderfully smooth fit inside your cycling shoes. And when the going gets sweaty, the Meryl® Skinlife yarns are quick to wick away sweat while also being infused with antimicrobial silver ions for freshness. Reinforced heels and toes boost durability and the Piqué ankle knit and Castelli logo gives them a timeless finish.