Poly cotton is a fabric that consists of cotton and polyester fibers. The most common ratio is a 65-percent cotton and 35-percent polyester blend, but 50/50 blends are used as well. The combination provides the benefits that cotton and polyester offer in one fabric.
By combining polyester and cotton, one gets the best of both worlds. Polyester is more durable due to its elasticity, which makes it less prone to tearing. It is also cheaper to produce than cotton, because it is a synthetic material. Cotton is more breathable and more comfortable, but is more prone to wear and tear. Cotton is more expensive than polyester, because it is a naturally grown fabric that depends on favorable growing seasons.