Scent: Citrus Description: Print may appear more yellow due to the fragrance. Air Fresheners come with a white string and are printed on both sides (a disclaimer is printed on both sides). How thick is the car air freshener paperboard? 85pt paperboard (about the same thickness as a nickel). How long does the smell last? Once taken completely out of the wrapper, the personalized air freshener should provide a pleasant aroma for at least 10-15 days in mild climates. Expect aroma longevity to decrease in hot climates. If only a portion of the wrapper is taken off the freshener, aroma longevity will be greatly increased.