Bis Certificate for Rubber Hawai Chappal The Rubber Hawai Chappals have been defined under the standard IS 10702:1992 of Bureau of Indian Standards (BIS). Any manufacturer who wants to manufacture and sell Rubber Hawai Chappals in the Indian market will now have to get BIS certification. In addition, all certified chappals are required to bear the ISI mark, ensuring that they are compliant with BIS standards and providing a guarantee to consumers that they are both of good quality and trustworthy.