The T-Shirts are Stanely Stella Unisex Creator. Stanley Stella are a member of the Fair Wear Foundation and have been attributed a 'Leader' status by the FWF. They use 100% organic cotton and have a number of certifications to make sure they adhere to the highest standards.
For full details on the above and more please see the following from their website:
The DTG printing is done by a local company based in Nottingham who are an official partner of Stanley Stella.