These longs socks are engineered to excel in even the iciest coldthe primaloft silver performance and merino wool blend delivers the best of both these materials the fabric is lighter and finer and dries 20 faster than any otherthe primaloft silver performance and merino wool blend combines excellent insulated warmth with fast drying in an ultrafine yarnreinforced towelling soledouble elastic rib top25 cm heightweight 38 g