These are thick socks made using a low gauge knitting machine.
The entire inside is knitted with pile, and then raised using a special machine.
Normally, it is brushed once, but by brushing it twice, it becomes more fluffy.
Because it easily traps air, it has high heat retention and excellent cold protection.
Fluffy and soft to the touch, it can be worn both indoors and outdoors.

Free Size 23-27 cm