Teko M3RINO.XC wool is sourced from Argentinian farms that have used environmentally-sound techniques for hundreds of years. The wool is shrink resistant and dyed with non-toxic dyes. The chlorine-free merino wool wicks moisture while the seamless toes, arch brace, articulated Y-heel and strategic use of cushioning ensures that Teko Socks will be your go-to socks - not just for the epic adventures but also for your daily journeys. Step into the longer lasting, better fitting and planet positive Teko Socks. Your feet will thank you.