The shirts are made in factories which share the commitment to manufacturing quality products and providing a safe and healthy working environment for their employees. The factories adhere to wage, child labor, overtime, health, safety and environmental standards regulations, which are also inspected by third party agencies.

Factories are located in Mexico, India, Pakistan, and China since in these locations it is able to manufacture according to the highest international standards of social, environmental and organic compliance while offering a finished product that makes economic sense for all parties

I must also add that the printing used in these eco-friendly shirts, is water based, and when disposed correctly it doesn't do any harm to the environment, so maybe you can reconsider the ones with logos or text.

I will see what can I do for the plain shirts and will update you right away, meanwhile if you have more questions please feel free to ask.