Calabria's PureVert Wake System has always been one of our favorite wakeboard toys. Built into the liner, the tanks are designed not only for safety, balancing the weight for even distribution across the hull, but also for convenience. Because they work without pumps, Calabria says, they fill in less than a minute and empty in 15 seconds. And considering that once full they churn up rampy wakes with excellent transitions and landing zones, you'll appreciate the quick fill time. Out of the box, the ballast will satisfy families with beginners or intermediate riders, but advanced wakeboarders will want additional weight.