F-One is formulated using a complex mixture of the finest ultra-refined rare oils to clean, condition, and protect all unfinished rosewood, ebony, and maple fretboards. 100% free of any lemon extracts, waxes, petroleum distillates, detergents, and water. Developed using only 100% naturally produced oils with a revolutionary formula that penetrates & conditions the wood to dry quickly, giving it a new look for months. F-One gives wood its life back. It leaves your fretboard looking new, playing great, and feeling smooth, never sticky or tacky.