The F suspended fourth chord is a 3-note chord consisting of the notes F, Bb and C.
You can see these notes highlighted in the interactive piano chart below.
The chord itself is often abbreviated as Fsus4.
Chords that are a superset of Fsus4. The chords include more notes but always F, Bb and C.
Chords that are a subset of Fsus4. These contain less notes but all of them are included in Fsus4.
In case you prefer a non-interactive variant of the chord chart, we've embedded a PNG image below that shows the notes for the the Fsus4 chord. Feel free to save or share the image as needed.