Baabaa merino winter sock endura blend merino wool with other performance fibres making their baabaa merino winter socks both super comfortable and warm even when wet the long cuff length is great for extra warmth right up to the calf baabaa merino multitube the natural insulation of merino wool in a versatile tube design wear as neck tube mask bandana skullcap etc silky itch free comfort natural odour resistance and a high warmth to weight ratio make this the perfect winter warmer acce