If you keep your boat at home with a cover on it, you probably know the routine.
Rain collects. The cover sags. Support poles fall over. Water pools. Moisture gets trapped underneath. Then you pull the cover off expecting to go boating and remember, Mother Nature does not behave. Especially when left unsupervised.
SwellUP is more than a boat cover support. It’s a total care system for your covered boat. Support is expected. Freedom is the real upgrade.
Instead of using traditional boat cover support poles, SwellUP inflates underneath your boat cover to support and tension the cover from below. The large inflatable sphere creates a high dome that helps rainwater run off instead of pooling on top of your cover. Unlike the small pressure point created by a support pole, SwellUP spreads that support across a large, soft surface, reducing stress on your cover when rainwater starts adding weight.
***BUT THE INFLATABLE PART IS JUST THE BEGINNING***
Water pooling? Handled. Keep reading if you’re looking to solve the rest of your boat cover headaches, with one system.
Let’s talk mildew, musty smells, pests, and getting 30 minutes of your life back.
Unlike wrestling with multiple boat cover poles, straps, and adjustments every time you cover the boat, SwellUP can be set up in as little as 30 seconds. Set it in the boat. Put your boat cover on. Hit the power button. Done.
Oh yeah, even if it were possible for SwellUP to tip over under your cover, it wouldn’t matter. It’s a giant sphere. It’s still 6 feet tall!
But keeping water off your boat is only half the job.
Boat Cover Support + Ventilation
A covered boat can trap heat and moisture, creating the perfect environment for mildew, musty odors, and unwanted guests. You know the ones: mice, wasps, spiders, and the rest of nature’s squatters looking for a quiet place to move in rent-free.
Pests prefer undisturbed places to build nests. Airflow, vibration, and strong minty scents can all help make the space underneath your boat cover less inviting. SwellUP provides all three.
The built-in fan continuously circulates air underneath your boat cover while also creating subtle vibration. Every SwellUP also includes a Scent Booster, with scents like peppermint and mint, to help keep your boat smelling fresh between trips.
At the same time, that continuous airflow helps reduce the stagnant, moisture-heavy air that contributes to condensation, mildew, and musty boat odors.
So instead of just propping up your cover, SwellUP tackles several common boat-storage headaches at once:
- Helps prevent rainwater from pooling on your boat cover
- Replaces frustrating boat cover support poles
- Sets up in as fast as 30 seconds
- Keeps the boat cover supported and tensioned
- Continuously circulates air underneath the cover
- Helps combat stagnant air, moisture, mildew, and musty odors
- Provides airflow, subtle vibration, and scent to help make the covered boat less inviting to pests
Who Is SwellUP For?
SwellUP was built for boat owners who store their boat at home, outdoors, or on a trailer with a boat cover installed between trips.
If your current boat cover support system involves poles, straps, buckets, PVC pipe, or whatever else you found in the garage, SwellUP was made for you.
Set it in the boat. Put the cover on. Hit the power button.
Then go find something better to do than babysit a tarp.
A Better Way to Support a Boat Cover
Traditional boat cover supports mostly do one thing: hold the cover up.
SwellUP supports the cover, helps shed rainwater, continuously circulates air, and helps make the space underneath less inviting to pests.
And it does it without spending half an hour playing Tetris with support poles.
No poles. No bailing. Just boating.
Protect What’s Yours. SwellUP®, Batten Down®.



