thermo knee socks grey colour Protecting the feet is essential in the colder months, when blood circulation is often not at its best, making it easy to suffer from frostbite and possibly cold-related joint problems and inflammation. Of course, there are many ways to protect against this, but one of the most effective is a thermo sock! Thermo socks are much better at retaining the natural warmth of your feet, while wicking away and absorbing any sweat. This is also important because, at rest, the liquid cools down quickly, causing serious discomfort but in any case discomfort. Wearing thermo socks is also perfectly comfortable if you wear the right size, trust us.