We offer hooded sweatshirts in mid and heavyweight styles. The main differences are obviously the weight, the mid option is 7.75 oz., and the heavyweight is 9.3 oz. Other than the weight difference, the mid option is offered in more colors, and the heavyweight option will be slightly more expensive.
Here's more detailed information on the Midweight Hooded Sweatshirt, and Heavyweight Hooded Sweatshirt.