ISO9001 does not refer to a standard, but a collective name for a class of standards. It is all international standards formulated by TC176 (TC176 refers to the Technical Committee for Quality Management System) and is the best-selling and most popular product among the ISO12000 standards.
ISO9001 quality assurance system is the foundation of enterprise development and growth.
As a buyer, you may also consider to work with a reliable manufacturer, Twinkling Star maybe a good choice.
Twinkling Star has good experience to work with international brands, and got the updated ISO9001:2015 on Nov.14 2019