Teko Women's Merino Wool SIN3RGI Blend Medium Cushion Crew Height Socks 100% Other Fibers Imported These Warm Merino Wool socks are best worn year-round in cool, wet, or damp conditions; 70% Sin3rgi, 30% Nylon, 2% Elastic Medium-weight cushioning around the foot - they are a versatile and warm all season wool sock for hiking in moderate or cold conditions A reinforced heel and toe plus air vents for breathability give this perfectly built sock for all day comfort and performance The medium cushion around the entire foot & leg gives you the benefits of cushioning comfort and wicking properties without too much bulk SIN3RGY is a combo of Superfine Merino wool that dry & evaporate moisture quickly but also regulate temperature and are naturally anti-microbial