Organic Sweat Shirt How Do I Go About Getting T-shirts Manufactured In My Design In A Fabric Of My Choice?

How do I go about getting t-shirts manufactured in my design in a fabric of my choice? - organic sweat shirt

I have an idea for a T-shirt brand, but do not just want someone elses with a traditional print T-shirts, I have my own design. I have no idea these things, so that would be any help or pointing in the right direction to be welcomed. I want t-shirts organic cotton, in bright colors. Sweatshop Free!