The Woolie Boolie is loved for it's warmth and comfort in a wide range of conditions, and that's thanks to the blend of Merino wool and polyester fibres. Together they give a sock that keeps feet warm when it's cold, even when wet, whilst also keeping feet cooler when things warm up. Not only that the wool and poly blend results in a sock wirth exceptional breathability so you'll never suffer from sweaty feet. With the padding of the Comp version you can be assured of even greater comfort and a luxuriously cosy feel in the cold and fresh feet when it warms up.