RelaxSan closed-toe medical compression maternity tights provide firm graduated compression (23-32 mmHg - Class 2), which helps improve blood circulation in the legs. They help prevent thrombosis and embolism, treat mild chronic venous insufficiency, and reduce symptoms of thrombophlebitis and more severe varicose veins. These graduated compression maternity tights are very comfortable, long-lasting and opaque thanks to the soft microfiber contained in their fabric, while the reinforced heels and toes and invisible flat seams guarantee maximum comfort and durability. They also feature a comfortable elastic top that moulds to your body in order to accommodate the baby during all stages of pregnancy.