After a long flight across the country or around the world, putting your shoes back on is a struggle. Blood has pooled in your legs from hours of inactivity, increasing your risk of a blood clot or DVT. This is often referred to as Economy Class Syndrome.
One of the things you can do to prevent a DVT when traveling is where support stockings. This will greatly reduce your risk of a DVT, and you won't be out of breath after you put your shoes back on before landing.