◆ Outer material is high-density and flexible nylon fabric , anti-wear, anti-corrosion, anti-mold change, high air tightness, durable and strong.◆ bag of blood pressure is made of high-quality imported TPU , avoiding the rubber allergy, and effectively extend the using life.◆ Products are anti-bacterial treatment can effectively inhibit bacteria growth and reduce the cross infection of patients.◆ After manual testing it can use for 10 million times inflatable experiments.