Each pack contains a microfibre polishing cloth and our brilliant patented Swipe string and fret cleaner, all in a handy resealable foil pouch! Save Tone - Removes corrosive, sound deadening sweat & grime. Chemical & Oil Free - Protect sound and your instrument's lacquer. Save Money - Makes strings last up to 5 times longer. Save Effort - Quickly cleans the surface & underneath of strings.