Carhartt Women's Force Grid Midweight Synthetic-Merino Wool Blend Socks are made of a merino wool, nylon, elastane blend. Raised grid patterns on arches help feet stay dry and ribbed channels on legs improve ventilation. Temperature-regulating synthetic-merino wool blend fabric keeps feet cool in summer and warm in winter. Enhanced heel pockets and Achilles's locks keep socks securely in place to prevent discomfort. Targeted cushioning on heels, arches, and toes protects feet by absorbing shock and reducing friction. Made durable with abrasion-resistant yarns in heels, arches, and toes, you can depend on these women's socks to stand up to wear and tear and fight odor. Offered in 2 women's sizes to ensure best fit: Medium (US Women's shoe size 7-9.5) and Large (US Women's shoe size 10-12.5). Carhartt knows the difference a good pair of socks can make when working outdoors or hiking and camping. Well-designed and made with durable, high-quality materials, Carhartt socks keep hardworking feet dry, protected, and comfortable.