These Women's Support Knee High socks are extremely comfortable, and are designed to apply medically correct graduated compression (15 mmHg) to the lower legs. This is done in order to therapeutically support and massage the lower legs when one needs to travel on long flights that can cause severe discomfort to those that may have a variety of problems and issues. Since these supports have been specially knit from nylon and Spandex (There is no uncomfortable restricting band at the top of them) you can rest assured that the support provided on these Support Knee Highs will give you the proper durability needed to handle the impact of long and somewhat uncomfortable journeys. The impact of wearing these items leads to improved circulation and reduced swelling. Hand wash these items which were made in the USA.