SwellUP works a bit like magic, but we’ll call it science so we don’t freak anyone out. It uses a unique system with a storage base and inflatable structure (yes, inflatable) to evenly tighten your boat cover across the entire surface. Water pooling? Not on SwellUP’s watch. It can’t tip over, and don’t worry about getting it perfectly centered. It keeps your boat cover secure and free from rips or tears in all kinds of weather. Oh BTW, that’s not all… #3 is worth a read.

Glad you asked. Swell doesn’t just keep your boat cover tight. Oh no. It also has air circulation powers, keeping a handle on mold & mildew while keeping your boat smelling fresh. As for pests? Wasps, mice, and spiders are not fans of what Swell is serving for dinner; Constant air circulation, subtle vibration, and a fresh smelling fragrance booster. Turns out most pests don’t like minty smells, airflow, or vibration. In summary, this thing keeps your boat smelling like a spa, helps prevent mold/mildew, prevents water from pooling on your cover, and deters pests. You’re welcome.

Simple: it keeps things tight. A good tensioner like Swell stops water from pooling, which is a short way of saying it helps your cover avoid damage, rips, tears, mold, or mildew. Plus, it extends your cover’s life—so you don’t have to replace it as often. Basically, it’s the boat cover upgrade you didn’t know you needed.

SwellUP doesn’t play favorites. Fishing boats, pontoons, bowriders, speedboats—if it’s a boat, SwellUP is here for it. It’s adjustable and customizable, so no matter your boat’s size or shape, SwellUP has you covered (pun intended). Have a boat that this won’t work in? Let us know, send us an email and we’ll work on a custom solution.

Can you? Sure, if you want to drive down the highway with your boat cover on, go right ahead. Should you? Hmm… it is the expressed opinion of Batten Down that you do not tow your boat down the highway while covered. Most boat covers don’t like high winds and you might be inviting rips and tears.

On a completely unrelated note… if you plug Swell into a small (say 100 watt) inverter that is connected to your boat battery, you no longer need to be attached to an extension cord. Since you now have a mobile setup, you may be wondering how fast you could go before the wind pushes the inflatable down. Who knows, we don’t recommend Swelling and driving, remember. I bet it would inflate back up even if you did go too fast though. If someone was going to try, maybe strap the cover down tight, crank the fan power controller up to 11, and close the vents on the inflatable. Then, just maybe, Swell would hold up at highway speeds. Hard to say, we haven’t tried…ok, we tried, it worked, but don’t do it. The warranty probably doesn’t cover that.