Dyna Medical Compression Stockings Class 1 (18-21 mmHg) provide controlled compression to the legs to squeeze the veins thereby ensuring the normal back flow of blood towards the heart. Stockings put maximum pressure on the veins at the ankle level and gradually delivers less tension as it stretches over the knee and towards the thigh.The pressure profile that is 100% at the ankle, 70% at the calf and 40% at the thigh. As a result, blood is forced along its natural course up the leg despite .