The lightest weight denim is between 5 - 12 oz. Chambray is a light cotton fabric that usually comes in light blue similar to denim, which is soft and airy, and worn in the Summer. Denim is versatile and can be mixed with linen, hemp, Lyocell, and Modal–all materials that keep cool in summer, are environmentally friendly, easy to wear, and easy to care for. Always look at the fabric content label to see what denim clothing is made from.