OS1st TS5 Travel Socks have medically correct graduated compression for the prevention of venous issues related to long term sitting, such as air travel and other forms of extended immobility. OS1st products are especially known for quality, comfort and ease of use. You will not believe you are using an FDA medical device. OS1st socks help improve circulation by reducing the risk of blood clots, treating and preventing pain related to DVT (deep vein thrombosis), providing enhanced oxygenation and by reviving legs after long stretches of immobility. Still providing OS1st’s premium quality, these proprietary socks are made with all the best features you normally find in your favorite socks…moisture wicking, odor control and blister protection, but now, in a more stylish and easy-to-wear option.