SUMO Skin 1000D
SUMO Sacs are made with Straight Line's flexible and puncture-resistant fabric known as SUMO Skin. It has a durable 1000D polyester core that is heat laminated to lightweight PVC skins with a bonding agent. This sandwich construction is 150% stronger in tearing tests and 37% higher in tensile strength than competitors, making it the most durable ballast bag available.
Every SUMO Sac is double welded to ensure a watertight seal. Straightline's tough SUMO Skin is overlapped and hot air welded. You can see the smooth and clean seams on the outside of every bag, and a second welding operation applies an inch wide sealing tape to the inside of every seam.
Straightline's unique LINK system provides a hassle-free connection to your SUMO Pump, keeping your boat dry on the inside. The Link Valve is watertight and can also be used as a convenient way to purge air from your bag.
1" NPT Valves
New and improved threaded valves provide a perfect watertight seal, and have been pressure tested up to 6 PSI. The 1" NPT ports allow built-in ballast systems to fill, drain, and vent quickly for hassle-free operation.