TEKO eco-performance Merino Wool Socks for Light Hiking / Casual / Walking / Running / Cycling 36% Merino Wool / 27% Nylon / 35% Recycled Polyester / 2% Elastic Made in US Designed for light hiking and everyday wear Organic, chlorine-free tekoMERINO wool is naturally wicking and insulating; recommended for all weather conditions Exceptional fit: Seamless toes, arch support, anatomical y-heel; comfort-stretch zones Reinforced with soft, durable tekoPOLY recycled polyester Made in USA