The 900lb. Straight Line Sumo V-Surf Sac is perfect for filling up a large v-drive locker or for placement inside the boat anywhere it fits. Popular for use in the rear storage compartments alongside the engine in v-drive boats, these single bag forms the foundation for a great wakesurfing ballast setup.

If you're incredibly courageous you can even fill one on each side of the engine, along with an equal amount of weight in the front of the boat for the ultimate wakeboarding wake.