Kowtow

All of their garments are certified under the Global Organic Textile Standard (GOTS).
[Source 2016][More on Eco-Certification]

All of the products this company sells are Fairtrade certified
[Source 2017][More on Workers Rights]

A grade in the Baptist World Aid Australia's 'Ethical Fashion Report 2018', which grades companies, from A to F, on the strength of their systems to mitigate against the risks of forced labour, child labour, and exploitation in their supply chains. Assessment criteria fall into four main categories: policies, knowing suppliers, auditing and supplier relationships, and worker empowerment.
[Source 2018][More on Workers Rights]