The XS150 wool knit insulated sock provides excellent protection for feet in the cold. Our warmest sock collection to date features extra padding on the heel and sole, with a three-way stretch elastic that enables optimal movement whilst providing ultimate comfort to the wearer. The XS150 has been designed with extreme comfort in mind, featuring a thick terry knit looped yarn, which has created a sock twice the thickness of the majority of its range and 26% increase to its weight over our XS84 sock proves the warmth this sock can bring to the wearer.