Pretty self explanatory why these are named the way they are. However, some saddles have both a Side Panel AND a Stud Band that also runs along the side. If you are not sure which is which, picture where the row of studs would be on your saddle... That is the Stud Band and the other will be your Side Panel.
We recommend the use of vinyl in this spot as it will stretch and spring back to help support the foam shape. Vinyl also doesn't break in like leather so it will keep the saddle looking sharp longer.