Totally waterproof and windproof with a heavier gauge knit than the companyrsquos thinner ankle socks and with a longer leg length sealskinz 100 waterproof mid weight mid length socks with hydrostop are ideal for anyone operating in cold wet weather conditions where added insulation is imperative and because sealskinz with aqua dynamic design and stretchdry technology are guaranteed 100 waterproof they are able to keep feet warm and dry with a fully breathable stretch fit for comfo