The Darn Tough Paul Bunyan Gravel men's sock is ever ready for business on even the coldest of days. The fully cushioned sock gives these extra tall socks an extra notch of comfort and warmth. The over the calf height sock backs up its tough promise with an unconditional lifetime guarantee. It includes fine gauge knitting, undetectable seam fusion and fast action wicking. It comprises of 68% nylon, 28% merino wool and 4% lycra?Â« spandex.