80%acrylic, 18%polyester, 2%elastan SIZE – Medium fits for (US Men Shoe Size 6-9.5, Women Shoe Size 7-9.5), Large fits for (US Men Shoe Size 9-12, Women Shoe Size 10-13) KEEP YOUR FEET WARM – Extra warm for the extreme cold weather during the winter. Heavily brushed fuzzy warm lining make these insulated thermal socks provide soft and comfort for your feet during extended outdoor trail cold weather. DESIGNED FOR EXTREME TEMPERATURES – Warmer Than Regular Socks! The insulated socks have been specially designed to keep your feet warm even when the temperature outside is too low. The thermal fuzzy socks are great ideal if you are working outdoors, go skiing or enjoy hiking and camping in the mountains during the winter. MULTI-USEING – The heated thermal socks are suitable for different situations, you can wear them as cabin socks, home floor socks, hiking socks, thermal socks, heavy work socks, winter warm socks, fuzzy socks, outdoor socks and sports socks. What’s more, you can wear these thermal socks as boot christmas socks, slipper socks, home sleeping socks or daily cozy socks in winter or in any cold weather areas. EXCELLENT GIFT CHOICE – Everyone needs more socks. Great socks often make great gifts in Christmas or other holidays. And these thermal socks make the perfect present for hikers, outdoor workers, for Thanks-giving or Daily Wear. It’s a great gift in winter for family, friends and anyone you love, as birthday, New Year, Anniversary Christmas gift.