American Slub Sock- Silver $22.00 Sold Out From our friends at American Trench, the American Slub Sock is quite simply the best slub boot sock out there. The rugged cotton blend slub yarn is mixed with wool and acrylic for optimum breathability, warmth and softness. The spandex in the sock sticks to your leg like glue; they don't fall down at all. It's the perfect boot sock and works great as a hiking sock. Made in USA Cotton wool blend yarn spun in USA 44% cotton, 28% acrylic, 16% wool, 10% nylon, 2% spandex Machine wash cold, tumble dry low