A frac plug that is energized by a ball member, the frac plug comprising an upper mandrel having a tapered outer surface, a seal member coupled to the upper mandrel, and a lower mandrel coupled to the upper mandrel. A button ring having one or more buttons is disposed about the upper mandrel. The lower mandrel is movable relative to the upper mandrel to move the button ring along the tapered outer surface and force the buttons into gripping contact with a surrounding wellbore. The seal member is movable into sealing contact with the surrounding wellbore by the ball member.