The MVP Proton Inertia is an understable control driver built to give beginners easy distance while still being controllable for players with more power. Proton is a firmer, slicker plastic than MVP's grippier base blends.

Flight Numbers: 9 / 5 / -2 / 2

Players rate it closer to 10.1 / 4.9 / -1.9 / 2, so expect a touch more speed and slightly less fade than the box says.

Proton holds its stability for a long time and does not beat in as quickly as a softer plastic would, which means the turn you get new is close to the turn you get after a season of play. It is forgiving of a nose-up release, which is exactly the kind of mistake newer players tend to make.

Powered out to around 300 feet it flies dead straight with a soft finish, which is why a lot of newer bags find their first long drive with a disc like this. Players with more power than that should add some hyzer to keep it under control, since it will keep turning if you overpower it flat.

Good for beginners who need a forgiving, high-glide driver, and for intermediate players who want an easy distance option. Bigger arms should treat it as a turnover specialist rather than a full-power workhorse driver.

Want the same mold in a grippier plastic? The MVP Neutron Inertia is the standard version. Need more overstable for bigger arms? The MVP Plasma Inertia holds up better in wind. Browse our stable distance drivers.

Speed 9, glide 5, turn -2, fade 2. Diameter 21.1 cm, rim width 2.0 cm, max weight 175 g.