We just got in Marcus Fabric's organic canvas, called Oasis. It is a light canvas (I would say approximately 5 oz. Definitely lighter than a 7 oz. canvas.) woven of Certified Organic cotton and using eco-friendly dyes.
Certified Organic canvas has been grown in a field that has been chemical and pesticide-free for the previous three years. The Eco-friendly dyes are free of toxins and are disposed of properly. The dying process minimizes energy and resources and also requires safety for the workers and fair wages.
We're currently carrying this fabric in eleven colors.