You change up your wardrobe when the weather turns toward the wintry. Your beer selection switches from summer sale to winter wheat. Your choice in cologne should follow suit - moving from light, citrusy base notes (hello, fresh!) to deep, muskier scents like oud.
What now? Oud. (That's "ooooh-d.")
Taken from the wood of mold-infected agarwood trees in South Asia, the oil sounds gross, but the smell it produces is like the cashmere crewneck sweater of fragrances - comfortable but with a hit of luxury, warm yet refined. What lands on your skin is a deep, woody smell that starts off intense and softens as you wear it. Oud's scarcity comes at a price, but because of its musky potency, a little goes a long way upon application. Use just a single spritz or dab.
Source : https://www.menshealth.com/grooming/g24844248/oud-cologne-men-ingredient/