The endura fs260 pro socks are made from meryl skinlife yarn with an antibacterial finish for maximum comfort and performance features of this cycle sock include a high density mid foot elastic for support and stability turned ankle cuff to prevent slippage flat toe and air mesh web on top of the sock for enhanced breathability endura fs260 pro sock features meryl skinlife yarn with antibacterial finish high density mid foot elastic for support and stability turned ankle cuff to prevent