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. Targeted Conditions: Circulation Improvement DVT (Deep Vein Thrombosis) Leg Cramps & Fatigue Enhanced Oxygenation Achy Legs & Feet Long trips or frequent traveling Performance Features: Makes traveling more comfortable & safe Supports overall foot structure Post medical treatment FDA Registered Seamless, left/right toe design Ultra-Soft MicroFiber Fabric Silver Ion treatment for odor control and a healthier foot environment Compression sock care instructions Comes with one (1) pair of socks per package.