FATSAC Brick Fat Sac Ballast Bag - 155lbs - Red [W702-RED]Brick Fat Sac Ballast Bag 155lbs Red The compact size of the FatSac Fat Brick makes it small enough to stash anywhere, but it offers enough capacity to balance the weight distribution within any type of boat. If you constantly struggle to keep the weight in your boat balanced, the FatSac Fat Brick is for you. Have a lot of batteries or a big stereo that makes the boat always lean to one side? This 155lb. ballast bag is compact and makes it easy to