-Fabric type: 38% Merino Wool, 45% Cotton, 10% Acrylic, 7% Elastine-ULTIMATE MERINO WOOL BLEND innovative thermal socks are crafted from 38% merino wool blended with a unique collection of various fibers to create socks of dreamy softness and infinite comfort not found elsewhere. Enjoy the ultimate benefits merino wool has to offer when combined with a collection of technology-tested materials that balance its functions.-ALL-WEATHER TEMPERATURE RETENTION - Merino wool has the incredible ability to adjust to external conditions, keeping you toasty warm when it’s cold out and cool when it’s hot. When hiking, out in the snow, or hunting, these survival socks are significantly warmer than cotton or standard wool. Wear them all year round and let these wonder socks adjust to your body’s momentary needs.-IDEAL MOISTURE-WICKING TECHNOLOGY - Merino wool is naturally moisture-wicking and absorbs condensation. The fine blend of other fabrics in these crew socks ensures the moisture evaporates and the socks remain dry, as opposed to socks with a less balanced count of merino fibers that become heavy with moisture.-SUPERB FIT FOR ALL DAY WEAR- Merino fibers are of a very fine texture, so these thoroughly warming socks are also deliciously lightweight. Effortless to pull on and off, just right for when you are itching to run off in the snow or bask in the sun. Forget that you are wearing socks as these stay firmly on, never slipping or sliding in your boots.