Product Description Thorlos Unisex-Adult J Max Cushion Running Rolltop Socks, White/Navy, Large Thorlos unisex running roll top socks constructed with thor lon fibers for superior softness, resilience, durability, and moisture-wicking for drier, better feeling feet.Flat knit instep and cushioning in arch gives better fit, more support and less pressure on the feet for a more comfortable run.Its padding specifically engineered to deliver maximum protection and comfort in the critical strike zones for any runner prone to blisters, foot pain or discomfort. 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.