THERMAL SOCKS: Specially designed for cold winter days these winter socks will keep your feet warm. Thermal socks feature thermoregulation to balance temperature keeping your feet warm when it’s cold and cool when it’s hot. Merino wool is soft against the skin and warm. It naturally wick away moisture providing dry and cozy feeling. DIABETIC SOCKS: Non-Binding thermal socks are great for blood circulation. Loose fitting socks easily slip over swollen ankles and are comfortable to wear as they won’t constrict your feet. The absolute best pair of socks for people who suffer from edema, diabetes and neuropathy. PREMIUM QUALITY: Wear these comfy socks all day long. Soft thick fabric will snugly cover your feet keeping it warm. Smooth flat toe seam doesn't rub or irritate the skin during wear while reinforced heel extends durability. Thermal crew socks are made of 20% Merino Wool, 35% cotton, 35% polyester, 5% acrylic, and 5% spandex. Wool blend fabric enhanced with stretch for stay up performance. DESIGNED FOR OUTDOOR ACTIVITIES: The insulated socks are essential gear when the temperature outside is way too low. The merino wool will trap the heat of your feet keeping feet warm as long as you wear socks. Ideal pair if you work outdoors, or simply go skiing or enjoy hiking, camping or hunting during the winter. If you have circulation problems these socks will help improve blood flow by reducing the amount of constriction around your calves and ankles. SIZING: Socks are wide and stretchy. Sock size10-13 will fit U.S. shoe size Men's 9-11.5 and Women’s 8-10.5.