The Merino Fleece sock is used, in the field, by both the Australian Antarctic Division and the Australian Defence Department personnel. The high merino yarn content coupled with the socks construction ensures warmth, durability and comfort. The “Y” Gore line in the heel prevents slippage and the padded welt provided additional comfort. A premium, quality sock. Fibre Content 83% Pure Merino Wool, 15% Nylon and 2 % Spandex