Featuring sealskinz unique hydrostop technology which gives you a much more secure fit between your leg and the top of the sock meaning the chance of water ingress through the top is massively reduced the natural abilities of merino with total protection of stretchdry by combining their stretchdry waterproof technology and a merino wool lining sealskinz achieve total waterproofness but with incredible comfort and breathability the merino wool traps air for warmth is highly breathable and nat