Product Description Darn Tough Merino Wool Micro Crew Cushion Sock Black, XL the Micro Crew Cushion sock is perfect match for that nice pair of hiking boots. Not too high not to low, its dense cushioning underfoot and built in Elastic arch support help your feet stay fresh and rejuvenated whether its on a hike, run or just a marathon day around town. California Prop 65 Warning : This product can expose you to chemicals including arsenic, which is known to the State of California to cause cancer. For more information visit to the website.