Product DescriptionA.certificates1.Patent NO.3676802.Taiwan DOH(Department of Health) certificate No.0024313.TTRI(Taiwan Textile Research Institute)test report No.TFF8C042B.Distinguishing characteristicsNano-scale infrared technologyEnhance bloody circulation at least 30%Remedial purposeFour seasonWarranty& maintenance service eMachine washableMade in taiwanWithout need for electricity,