The note unfolds with a robust, almost aggressive tenacity, an undeniably dark and industrial character. It is primarily defined by a potent, charred rubber accord, reminiscent of vulcanized material heated to a point of friction. There's a distinct smoky bitterness, often with undertones of creosote or asphalt, lending it a tarry, slightly viscous olfactive texture. Beneath this initial impact, one might discern a subtle, almost leathery musk, hinting at the complex degradation of organic polymers, or even a fleeting metallic tang, sharp and cold like machinery. It possesses an immense intensity and projection, behaving almost exclusively as a foundational base note, anchoring compositions with its profound weight and astonishing longevity, slowly softening into a more diffuse, yet persistent, dry-down that whispers of worn leather and the ghost of burnt fuel.