Make laundry slightly more fun! Add 4-6 drops of fragrance oil to each dryer ball. Belle Rouge - Unique notes of jasmine, ambergris, and cedar mesh so well that many call it one of the few truly universally flattering scents. Sunwashed Linen - The scent of freshly washed linen, dried outdoors on a warm sunny afternoon. April Fresh - Just like the name implies. Exotic - Peach, strawberry, melon, and cassis on an undertone of apple create a truly unique fragrance. Blue Lava - Pineapple, goji berry and mango are perfectly blended for an exotic sensation, as a hint of driftwood adds lingering tones of sunny warmth to the island sensation. Royalty - Clean, ozone, fruity green top notes with jasmine, lily of the valley, mid notes of lavender, and woody, earthy, and musky bottom notes. Imported Mahogany - The manly scent you've been waiting for! The luxurious scent of fine woods blended with light scents of lavender and geranium notes. MPORTANT! Once you add the fragrance to your dryer balls, let them dry for up to 24 hours and then place them in the dryer by themselves and dry them for 15-20 minutes. Following this process keeps clothes from staining from direct contact with wet fragrance oil. Repeat this process every time you add fragrance oil. Be sure to never let wet fragrance oil come in contact with your linens or cabinetry. Scent Longevity Disclaimer: The length of time the fragrance remains noticeable may vary due to multiple factors, including but not limited to surface material, amount applied, cleaning technique, room size, airflow, temperature, humidity, frequency of use, and storage conditions. Individual results may vary.