Pretty clever: Rohner Fibre High Tech socks absorb moisture, release it to the outside and keep your feet dry. These are ideal properties for shoes with a membrane lining. The comfort of the socks made from a merino synthetic fiber blend is also high: the socks fit snugly, whether over the heel, forefoot, instep or longitudinal arch. Unlike other manufacturers, Rohner produces the socks using different knitting techniques. This results in an extremely good fit and they don't cut in anywhere. Smarter socks!