Fly High

OnlyInboards is your authorized retailer for Fly High’s FatSac inflatable ballast solutions. Trusted by leading boat manufacturers, FatSac pioneered the inflatable ballast market with precision-engineered stock sacs, custom semi-custom kits, high-speed pumps, and marine-grade fittings—all crafted from durable, UV-resistant materials for long-lasting performance. Whether you’re shaping a bigger wake or fine-tuning weight distribution, our complete Fly High FatSac lineup delivers the reliability and convenience you need on the water.