Amazon.com.au:Customer reviews: Thick Thermal Hiking Socks, Sunew Heavy Fluff Durable Slipper Snug Ankle High Socks, Unisex Comfortable Trekking Camping Socks for Extremely Cold Weather, Fit for Outdoor and Home, 1 Pair Red Medium
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They are warm but not as warm as I was expecting. I have other socks that seem to be warmer. They're also really large. The heel of the sock is at the back of my calf if I put my toes all the way in and they're pretty loose. On the other hand this does make it easy to layer warmer thicker socks under it.