Whether yoursquore an all weather runner climber or hiker these thin and lightweight sealskinz 100 waterproof thin mid length socks are designed for any activity where you want water protection but minimal insulation and maximum breathability sealskinz socks are made in the uk using their aqua dynamic design principles with a high performance hydrophilic membrane outer and a merino wool lining providing dryness with moisture control and comfortpatented stretchdry technology ensures