From cross country skiing to soccer, this sock stands up to it all! Ribbing at the center foot and ankle keep this extremely lightweight and comfortable sock in place! No sagging or shifting so that you can concentrate on your activities. High cuff extends up beyond mid-calf, a breathable, versatile and incredibly durable sock for all active occasions. 42% alpaca, 15% wool, 28% acrylic , 13% nylon, 2% lycra.