Orthofit Inflight Socks helps you maintain healthy blood flow on long journeys and reduce the risk of Deep Vein Thrombosis. Benefits: - Provide a graduated compression - Medically approved aid for the prevention of Deep Vein Thrombosis on long haul flights, train, bus and car journeys - Help reduce any build-up of excess fluid and give relief to tired feet - Soft, comfortable and non-itchy - Reduces swelling - Helps you feel fresh on arrival - Size: Small - Shoe size: 3-5 - Ankle circumference: 21.5cm-26.5cm