William Rast Idol is mainly marketed towards women, but is a favorite among anyone who enjoys floral and citrusy notes in a perfume. Many people apply this long-lasting scent before going to the office or leaving to run errands for the day. A: Like most eau de parfums, William Rast Idol lasts around eight to ten hours once applied to the skin. If customers spray the product on their clothes, the product can last even longer. However, certain factors such as the weather and an individual's skin conditions can affect the longevity of a perfume. For example, dry skin tends to hold a scent for a lesser amount of time than well-moisturized skin.