One of the reasons we chose to offer exclusively GOTS certified garments was because of the rigorous no-nonsense criteria & testing required to obtain certification. Third party testing is required and run as indicated by GOTS:
"On-site inspection and certification of processors, manufacturers and traders is performed by independent Third-Party GOTS accredited Certification Bodies and forms the basis of the GOTS monitoring system. It serves to provide a credible assurance for the integrity of GOTS certified textiles."
For more information please visit GOTS.