RelaxSan standard medical compression knee high socks exert firm graduated compression at the ankle (23-32 mmHg Â Class 2), with the level of compression gradually decreasing up the garment. These knee high socks are produced with extremely high-quality yarns and are therefore very durable and soft. The flat seams provide you with maximum comfort, while the soft elastic bands under the knees do not squeeze your calves and prevent the knee highs from rolling up. Finally, the anatomically shaped heels guarantee perfect fit and the correct distribution of compression. Standard size and open toes.