I agree that letting it hang outside will help remove some of the odor as well as using baking soda or charcoal to help absorb the odor if you can't wash it. Is this material that can be washed? If you can wash it, I would do that with unscented detergent and add some borax or baking soda to the water as well. You may need to wash it several times before the odor comes completely out. I'm very sensitive to the chemicals in all fabrics and so all my clothing and even the fabric that I use in quilting has to be washed numerous times before I can use it or handle it...but with enough washings you should be successful.