Description The Merino Wool content helps regulate foot temperature, is high wicking and is anti-microbila, keeping you feet fresh and comfotable. Produced with LYCRA® SPORT fibre to ensure a close, comfortable fit. Socks designed and manufactured by HILLY, the UK's premier technical performance sock company for runners – founded by Ron Hill. Produced with LYCRA® SPORT fibre to ensure a close, comfortable fit. Socks designed and manufactured by HILLY, the UK's premier technical performance sock company for runners – founded by Ron Hill. Synthesis yarn of merino wool and polyamide provides comfort, temperature regulation, high moisture transfer and durability Cruelty free Merino Wool – temperature regulating, high wicking and anti-microbial LYCRA® DRY TECHNOLOGY provides long-lasting fit with quick-dry comfort Med-level cushioning in key pressure zones for optimum comfort Double terry loop cushioning for all day comfort and durability Double terry loop cushioning for all day comfort and durability Reinforced toe box to avoid holes & blow outs when descending Vented upper and arch grip Close fitting cuff with extended depth to prevent debris entering the sock with protective ankle pads Flat toe seam construction SIZE GUIDE – HILLY SOCKS Please use the chart below to determine your sock size. Small Medium Large Extra Large UK 3 – 5.5 6 – 8.5 9 – 11.5 12 – 13 Euro 35.5 – 39 39.5 – 42.5 43 – 46 47 – 48.5 USA Men 4 – 6.5 7 – 9.5 10 – 12.5 13 – 14 USA Women 5 – 7.5 8 – 10.5