Socks bearing the name of Antarctica.
In a nutshell, these are super warm socks.
As for how warm it is, you can spend time without slippers, not only during snow activities, but also on the wooden floor (no floor heating) in the middle of winter.

YETINA's patented brushed fabric has extremely high heat retention and a gentle touch, and its bulky fabric provides excellent sole cushioning.
When you hold it in your hand, you will be surprised by the thickness and the fluffy feeling when you try it on. However, you may not be able to wear tight shoes that are too thick...
In addition, acrylic and wool, which have antibacterial and deodorizing properties, are used, so it is difficult for odors to occur.
 
With a cylindrical design, it adopts Free Size Fit that changes its shape according to the wearer's foot. It can be purchased regardless of gender or foot size, making it a perfect gift for those who are sensitive to the cold.
 
The length covers up to the calf, and ribbed knitting around the opening and ankle prevents the socks from slipping down.

YETINA Antarctica Socks for extreme cold conditions.
It keeps your feet warm.