This waterproof and breathable sock is comfortable and warm the part of the sock that is next to your skin is 40 merino wool which means it is warm comfortable and naturally anti bacterial specially developed for trekking in arduous wet environments these dexshell waterproof trekking socks are a fantastic addition to your outdoor gear we were so pleased to hear that these dexshell waterproof trekking socks received a commended award in the best footwear category from the prestigious camping maga