Formulated using a complex mixture of the finest ultra refined tree and seed oils to clean, condition & protect your fretboard. 100% free of any lemon oil extracts, waxes, petroleum distillates, silicone, and water. MusicNomad chose not to use any lemon oil because it contains d-limonene, which is a strong solvent used to remove paint and glue. In addition, they believe the high acidity levels of lemon oil can dry out the fretboard over time. F-ONE leaves your fretboard looking new, playing great and feeling smooth. MusicNomad use 100% naturally produced oils and is safe on all unfinished Rosewood, Ebony and Maple fretboards. Order here.