Draft Stoppers contain all natural balsam. They are fragrant & healthy (see more info below). If you have any questions, please ask. We have been doing this for years & can help. We reduce the length of any of our draft stoppers at no charge to fit smaller doors, windows, or other special spaces...................................... ***Product Customization Requests*** Please make request within 30 minutes of placing your order. On our product listing, under "In Stock" it says Sold & shipped by "The Maine Sales Company". Click on this link, it will take you to our company's storefront. At the bottom right, under "Further Information" click "contact the seller", then click "an order I placed" or "an item for sale". Next select the subject " Product Customization", click on "write message", and send instructions or questions. All the balsam products are filled with balsam fir needles and twigs that have been professionally processed and dried. Because of this process, the scent of our items will last for many years. Our draft stoppers reduce heating costs. They smell great, but that is just a bonus. Balsam is the perfect filling to seal the crack under the door, or window. The balsam fir is common in Northern New England, and is our well-known Christmas tree. For centuries, boughs were scattered over floors of churches and houses during winter, providing a clean, scented covering. Long ago, people realized the aromatherapy benefits, the uplifting fragrance helped overcome winter blues and encouraged feelings of contentment and joy. ***Please note*** While balsam has a natural pleasant healthy scent, some people with allergies or respiratory ailments may want to avoid it.