Featuring 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 hydrostop our unique new technology gives you a much more secure fit between the top of the sock and your leg meaning the chance of wateringress through the top is massively reduced enabling you to go out and stay out whatever the weather stretchdry sealskinzs stretchdry technology enables themnb