Our shirts are printed on 100% cotton. Cotton, of course, is not the only textile fiber available, but it has significant environmental and performance advantages over other fibers. A few examples:
Cotton uses sunlight and converts it directly to a fiber without intermediate processing steps. That’s increasingly important, since processing other fibers, even those from biological sources, require a large amount of energy to produce fiber.
Wool requires four times more land than does cotton to produce fiber. Silk requires 20 times the land to produce the equivalent amount of silk fiber.
Fibers that are based on corn and bamboo also require intermediate processing and additional chemicals to create a rayon-type fiber, which is still not a direct plant-based production of fiber.
As a natural, renewable fiber, cotton has obvious environmental and sustainability advantages over petroleum-based synthetic fibers. Unlike petroleum-based fibers, cotton is energy self-sustaining, and does not contribute to net green house gas emissions.