Stanfield's Men's Superwash Wool Long Johns are made with a 1x1 rib fabric that uses unique yarns to create a comfortable and warm wool garment. Nylon has been added to improve the durability and extend the life of the Long John underwear. The Long Johns feature a double seat for warmth, reinforced cuffs with spandex for comfort and shape retention, leg gussets that give thighs extra room for a proper fit, and our plush back signature elastic waistband.