Durable Wider Heel and Toe, Comfortable Fit, Soft, Warm Our Extra Fine Merino Crew Socks are ultimate softness and natural temperature regulating comfort. The front yarn is the spun woolen yarn with over 55% merino wool and the toe and wider heel portions are reinforced with nylon. So, they are durabler without compromising the warmth and comfort of wool, compared to other wool socks. Their simple, understated style presents the highest level of softness, warmth, and comfort disguised as a plain sock easily matched to any style of clothing or shoes.The wool item is very delicate. We recommend you wash it according to our Socks Care instruction in a washing bag to wear comfortably for a long time. Made in JapanMaterial: Wool 43%, Nylon 32%, Acrylic 23%, Polyurethane 2%Men's Quality Merino Wool SocksMen's Signature Socks* The actual colors may look different from the colors in the pictures depending on your monitor, browser, the color of light, Illuminance and view angle.