The Boat Cover Support that Inflates
Original price was: $279.99.$249.99Current price is: $249.99.
Original price was: $279.99.$249.99Current price is: $249.99.
Original price was: $279.99.$249.99Current price is: $249.99.
Costs more than a pole. Does more than a pole.
SwellUP is the all-in-one solution for your boat cover headaches.
Inflates in 30 seconds to keep your boat cover tight, stop rain water pooling, circulates air, and keep your boat smelling fresh. No poles. No bailing. Just boating.
⚡More than just a pole replacement
⚓Inflates in 30 seconds.
↕️Adjustable height from 24″ to 72″
🔄Air Circulation + Scent Booster
🌦 Keeps your cover tight & stops rain pooling
📥Self-storing base for fast & easy setup and takedown.
🌊 Protects your boat & cover investment
🚤 Works with bowriders, runabouts, pontoons, cruisers, fishing boats, & many more
Download:
Instructions.pdf
| Weight | 12 lbs |
|---|---|
| Dimensions | 20 × 18 × 16 in |
| Centering Magnets | Add Magnets (support self centering), No Magnets |
Dan P (verified owner) –
Swell is so much easier and faster than any pole tensioning systems, both for setting up and putting away! I assumed it would take awhile to inflate, but it’s super fast. Even though it costs more than the pole systems, it’s worth every penny and you won’t regret it!
Chuck –
20 Ft Center Console Aluminum Bay Boat
I love the ease of use of this cover tensioner. Just put it in position and plug it in. Works perfectly with my boat and fitted cover. No more bailing water off my cover or out of the boat when storing it. 5 stars
Mark Pass –
I have been dealing with Boat Cover Support systems for over 50 years and this is by far 100% the best. It can be installed in less than a minute. I’ve had mine installed for over five months now and no evidence of mildew, insects or rodents. Without a doubt, the best accessory I’ve ever bought for any of my boats throughout the years.
19 foot Mastercraft pro star 190
John C –
This undercover inflatable is a lifesaver. Before using it, my boat cover would always sag and collect water after any rain. Now, the cover stays tight and dry, even during heavy downpours. It was easy to install, and the quality is good. I’ve had it for a few months now, and it’s still going strong. Love the constant air circulation and fresh smell it keeps. This is a must-have accessory for anyone who wants to keep their boat and cover in top shape!
Brian –
21’ Mastercraft, Maristar
I’ve been dealing with rainwater puddling on my boat cover for years. After trying several DIY fixes, I decided to give this inflatable thing a try. Yeah, worth it! It’s easy to install and does exactly what it’s supposed to. My cover stays tight, and I haven’t had any issues since I started using it. It’s made boat maintenance so much easier, and I’d recommend it to any boat owner. Side note, pest deterrent is a big plus.
Jake H (verified owner) –
It’s a good time taking your sons fishing. It’s less of a good time when you are taking your sons fishing and the game warden asks to see your life jackets. It’s REALLY NOT a good time when the game warden gets pissed because all you have is two horse collars and a strawberry shortcake lifejacket after your expensive self inflating life jackets went off two days earlier because my trash boat cover set up let them get soaked during a storm. Get a SwellUP, keep game wardens happy, and avoid having to wear wet mildew covered strawberry shortcake life jackets. Easy to set up. Keeps the boat dry and airs it out. Great stuff!
Clarke –
21’ Ranger, Bass Boat, Z521
I’m so glad I bought this inflatable, cover support. It has completely solved the problem of water pooling on my cover and musty smells when left covered for a long time. As a bonus, it keeps pests like mice and wasps from getting underneath. I haven’t had any wasp nest issues since installing it, which is a massive relief. It’s sturdy, easy to use, and has held up through several storms. Would recommend it.
Mike –
21’ Four Winns, H210
After dealing with water pooling and an invasion of wasps under my boat cover, I decided to try this cover tensioner… It works. My cover now stays tight, no poles that can tip over. Noticeable decrease in wasps and haven’t noticed any mice. It was easy to use, and the peace of mind it provides is invaluable. If you want to protect your boat from water and pests, this is the product
Taylor –
Pretty happy with this system. New boat owner here, and this seemed like the obvious choice when looking at all the options available. Couldn’t find many high rating reviews for the support poles. Straightforward to use and glad I don’t have to go through all the struggles I read others going through. I like that it does more than just tension the cover too.
Rob –
24’ Avalon
This thing has been an absolute game-changer. Not only does it keep my boat cover tight and free of rainwater, but it also prevents pests like mice and wasps from setting up shop inside. I’ve noticed a huge decrease of wasps in my boat since installing. Installation was quick and easy. Highly recommended.
Colin –
This inflatable is amazing! It keeps my boat cover tight, so there’s no water buildup, and it also acts as a barrier against pests. I used to find wasps nesting under the cover and mice trying to tear up my seats, but not anymore. It’s like having a dual layer of protection for my boat. The product is durable, easy to install, and has made maintaining my boat so much simpler. It’s worth every cent.
Steph –
Very happy with this product. Would recommend it. I thought it was too big for my boat at first , but after opening some of the vents on the fabric portion, I was able to adjust the height to exactly what I needed. Great product.
Jeff –
About damn time somebody made this. I’ve spent hours over the years scooping out water from a flooded cover and who knows how many covers I’ve bought over the last decade. I built a diy frame that worked pretty good, but that takes 30 min to set up. Threw this in my boat, put the cover on, and plugged it in. Less than 5 minutes total.
Thomas –
Batten Down’s boat cover tensioner is a game-changer. It keeps my cover tight, preventing any sagging or water pooling. Installation was straightforward. Throw it in, plug it in, Done…too easy. Highly recommend this product to anyone with a boat! Also like the decrease in musty smells.
16’ V-hull. Jon boat