... design: silk screen printing, 4c offset printing6) Perfect for premium gifts, advertise for sport, medical, commercial, party. Material:100% eco- ... friendly tyvek materialCertificate:SGS, RoHS, ISO, SEDEX certificate can be supplied. ... .00 KG/CTNG.W. :6.00 KG/CTN factory make tyvek wristbands for your promotion, party and events