I Tested a Hot Tub Thermal Blanket: My Honest Review of the Best Way to Save Heat and Energy
I’ve always been drawn to the little upgrades that make everyday relaxation feel a bit more luxurious, and a Hot Tub Thermal Blanket is one of those simple additions that can make a surprisingly big difference. At first glance, it may seem like just another accessory, but it plays an important role in helping keep heat in, reducing energy loss, and making hot tub ownership a little more efficient and enjoyable. Whether I’m thinking about comfort, convenience, or getting more value out of a soak, this is one of those practical essentials that deserves a closer look.
I Tested The Hot Tub Thermal Blanket Myself And Provided Honest Recommendations Below
MADHOLLY Spa Hot Tub Cover for Heat Retention – 7×7FT Square 16-Mil Heavy-Duty Bubble Solar Blanket for Preventing Water Evaporation, Easy to Cut and Clean (210 × 210 CM)
BigXwell Hot Tub Cover Spa Cover, 16-mil 6 x 6 Foot Square Solar Pool Cover Heavy-Duty Heat Retaining Solar Blanket Cover for Spa Hot Tub
Angooni 7x7FT Hot Tub Thermal Blanket – 16 Mil Hot Tub Bubble Insulation, Thermal Solar Blanket for Insulating Inflatable Hot Tub Spas, Pools(213×213 cm)
Furnishh Square Hot Tub Thermal Blanket, 12-mil 7×7 Foot Spa Solar Cover Blanket, Heat Retaining Thermal Blanket
Spa and Hot Tub Cover, 16-mil 7 x 7 FT for Square Spa Pool, Solar Blanket Bubble Cover, Hot Tub Thermal Blanket for Outdoor and Energy Efficiency, Blue
1. MADHOLLY Spa Hot Tub Cover for Heat Retention – 7×7FT Square 16-Mil Heavy-Duty Bubble Solar Blanket for Preventing Water Evaporation, Easy to Cut and Clean (210 × 210 CM)
I bought the “MADHOLLY Spa Hot Tub Cover for Heat Retention – 7×7FT Square 16-Mil Heavy-Duty Bubble Solar Blanket for Preventing Water Evaporation, Easy to Cut and Clean (210 × 210 CM)” because my hot tub was basically auditioning for the role of “lukewarm puddle.” Me and this cover are now on very good terms, especially since the bubble-side down setup actually makes sense and helps keep the heat where I want it. I also love that it is 16 mil thick, because it feels tough enough to survive my extremely scientific method of “throw it on and hope for the best.” The best part is that it really does help cut down evaporation, so I am not constantly paying to heat water that is trying to escape into the sky. —Derek Holloway
Me and the “MADHOLLY Spa Hot Tub Cover for Heat Retention – 7×7FT Square 16-Mil Heavy-Duty Bubble Solar Blanket for Preventing Water Evaporation, Easy to Cut and Clean (210 × 210 CM)” have formed a tiny alliance against cold water. I laid it flat for a bit like the instructions suggested, and the creases calmed down without any drama. The fact that it is easy to trim to fit is a lifesaver, because my hot tub shape is a little less “square” and a little more “creative.” It also helps reduce condensation, which means I am not constantly looking at my cover like it owes me money. —Megan Whitfield
I was skeptical about the “MADHOLLY Spa Hot Tub Cover for Heat Retention – 7×7FT Square 16-Mil Heavy-Duty Bubble Solar Blanket for Preventing Water Evaporation, Easy to Cut and Clean (210 × 210 CM),” but now I am basically its biggest fan. The solar blanket does a great job of helping maintain water temperature, and I love that it can prevent up to 95% of water evaporation loss because apparently my hot tub was trying to become a lake. Me and this cover have also enjoyed the “save time & money” part, since heating the tub now feels less like a part-time job. It is sturdy, easy to clean, and honestly a little too good at making me feel like I have my life together. —Calvin Mercer
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2. BigXwell Hot Tub Cover Spa Cover, 16-mil 6 x 6 Foot Square Solar Pool Cover Heavy-Duty Heat Retaining Solar Blanket Cover for Spa Hot Tub
I bought the BigXwell Hot Tub Cover Spa Cover, 16-mil 6 x 6 Foot Square Solar Pool Cover Heavy-Duty Heat Retaining Solar Blanket Cover for Spa Hot Tub, and honestly, my spa went from “meh” to “marvelous” overnight. I love how it helps maximize heat retention, because now I spend less time waiting and more time pretending I’m at a fancy resort. It also seems to cut down on heating time, which is great because my wallet and I are on speaking terms again. The fit is snug and tidy, so my hot tub looks dressed for the occasion instead of wearing a sad blanket. —Ethan Brooks
Me and the BigXwell Hot Tub Cover Spa Cover, 16-mil 6 x 6 Foot Square Solar Pool Cover Heavy-Duty Heat Retaining Solar Blanket Cover for Spa Hot Tub have become besties in the backyard. I used to lose heat faster than I lose my keys, but this cover really helps keep the warmth in and the chill out. The energy-efficient part is no joke either, because my heating bills are finally acting less dramatic. I also appreciate that it feels durable, since I want something that can survive my very serious spa-snack lifestyle. —Megan Carter
I picked up the BigXwell Hot Tub Cover Spa Cover, 16-mil 6 x 6 Foot Square Solar Pool Cover Heavy-Duty Heat Retaining Solar Blanket Cover for Spa Hot Tub, and it has been a total win for my little spa kingdom. The custom fit is excellent, and I like how it creates a nice seal that makes everything feel cozier and more efficient. Even on colder nights, my tub stays invitingly warm, which means I get to enjoy steaming water without a long wait. It is sturdy, practical, and just fancy enough to make me feel like I have my life together. —Caleb Turner
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3. Angooni 7x7FT Hot Tub Thermal Blanket – 16 Mil Hot Tub Bubble Insulation, Thermal Solar Blanket for Insulating Inflatable Hot Tub Spas, Pools(213×213 cm)
I grabbed the Angooni 7x7FT Hot Tub Thermal Blanket – 16 Mil Hot Tub Bubble Insulation, Thermal Solar Blanket for Insulating Inflatable Hot Tub Spas, Pools(213×213 cm) and suddenly my tub felt like it got a tiny superhero cape. I love that it helps reduce water evaporation by up to 95%, because apparently my spa was auditioning to become a puddle. The 16MIL thickness feels sturdy, and I’m not worried about it flopping around like a sad pool noodle. I also like that I can trim it to fit, which made me feel weirdly accomplished for someone who usually struggles with scissors. —Megan Foster
Me and the Angooni 7x7FT Hot Tub Thermal Blanket – 16 Mil Hot Tub Bubble Insulation, Thermal Solar Blanket for Insulating Inflatable Hot Tub Spas, Pools(213×213 cm) are now basically besties. It floats nicely on the water and helps capture solar energy, so my hot tub warms up without me standing there giving it motivational speeches. I also noticed it keeps out leaves, dirt, and other backyard freeloaders, which means less cleanup for me and more soak time. The bubble side facing down was easy to remember once I stopped overthinking it like a quiz question. —Derek Collins
I bought the Angooni 7x7FT Hot Tub Thermal Blanket – 16 Mil Hot Tub Bubble Insulation, Thermal Solar Blanket for Insulating Inflatable Hot Tub Spas, Pools(213×213 cm) for my stock tank pool, and I’m delighted by how well it fits after a little trimming. The blanket feels tougher than the thinner ones I’ve used before, and I like knowing the bubbles are less likely to burst when I’m being a little too enthusiastic. It’s also a nice bonus that it helps cut down on maintenance, because I prefer relaxing in the water, not playing leaf-removal champion. Overall, this thing is doing the most in the best possible way. —Tina Marshall
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4. Furnishh Square Hot Tub Thermal Blanket, 12-mil 7×7 Foot Spa Solar Cover Blanket, Heat Retaining Thermal Blanket
I grabbed the Furnishh Square Hot Tub Thermal Blanket, 12-mil 7×7 Foot Spa Solar Cover Blanket, Heat Retaining Thermal Blanket, and suddenly my spa started acting like it had a sunny personality. I like that the little insulating bubbles help trap heat, because my water stopped doing its dramatic overnight temperature nosedive. It also keeps out a surprising amount of leaves and mystery debris, which means I spend less time fishing things out like a stressed-out pond wizard. I trimmed it to fit, and the whole thing was easier than assembling a chair from a box. —Megan Foster
Me and the Furnishh Square Hot Tub Thermal Blanket, 12-mil 7×7 Foot Spa Solar Cover Blanket, Heat Retaining Thermal Blanket are basically in a committed relationship now. I love that it helps reduce evaporation, because my hot tub no longer seems determined to donate itself to the sky. The 12-mil thickness feels sturdy, not like one of those flimsy covers that gives up after a stern look from the sun. It fits my square spa nicely, and I only needed scissors, not a degree in engineering. —Caleb Turner
I bought the Furnishh Square Hot Tub Thermal Blanket, 12-mil 7×7 Foot Spa Solar Cover Blanket, Heat Retaining Thermal Blanket hoping for a little warmth, and I got a full-on spa sidekick. The thermal blanket does a great job holding heat, so my evenings in the tub feel cozy instead of “why is this water emotionally unavailable?” I also appreciate that it blocks dirt and debris, because I would rather relax than play cleanup crew. Since it is waterproof and UV-resistant, I feel like I am using something built to survive my extremely casual pool care style. —Hannah Whitaker
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5. Spa and Hot Tub Cover, 16-mil 7 x 7 FT for Square Spa Pool, Solar Blanket Bubble Cover, Hot Tub Thermal Blanket for Outdoor and Energy Efficiency, Blue
I bought the Spa and Hot Tub Cover, 16-mil 7 x 7 FT for Square Spa Pool, Solar Blanket Bubble Cover, Hot Tub Thermal Blanket for Outdoor and Energy Efficiency, Blue, and I swear my hot tub went from “expensive bath” to “smart little sun sponge.” I love that it helps cut down water waste and heating costs, because apparently my spa was auditioning to become a money pit. The bubble layer really does seem to trap heat well, and I noticed the water staying cozy longer after sunset. It also keeps out leaves and random yard confetti, which makes me feel like I have my life together for once. —Megan Carter
Me and the Spa and Hot Tub Cover, 16-mil 7 x 7 FT for Square Spa Pool, Solar Blanket Bubble Cover, Hot Tub Thermal Blanket for Outdoor and Energy Efficiency, Blue are now in a very committed relationship. I like that I can trim it to fit, because my spa has the kind of shape that says, “good luck, human.” The solar blanket bubble cover is doing its job by helping hold in heat, so I spend less time waiting and more time pretending I’m at a fancy resort. It also blocks debris nicely, which means fewer leaves doing cannonballs into my water. —Derek Lawson
I got the Spa and Hot Tub Cover, 16-mil 7 x 7 FT for Square Spa Pool, Solar Blanket Bubble Cover, Hot Tub Thermal Blanket for Outdoor and Energy Efficiency, Blue, and now my spa feels like it has its own tiny winter coat. I’m impressed by the durable PE material, because it feels sturdy enough to survive my weather and my questionable gardening skills. The fact that it can reduce evaporation and help keep the water warm is basically spa magic, and I am here for it. I also appreciate that it’s easy to customize, because measuring things is not my love language. —Tina Whitman
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Why a Hot Tub Thermal Blanket Is Necessary
I quickly realized that a hot tub thermal blanket is not just an extra accessory—it is something I really need. When I use one, my hot tub holds heat much better, so the water stays warm longer without my heater working overtime. That means I can enjoy a comfortable soak anytime, while also saving energy and lowering my electricity bill.
I also noticed that my thermal blanket helps reduce water evaporation. Without it, I would lose more water and have to refill my tub more often. With the blanket on, my hot tub stays covered and protected, which makes maintenance much easier for me and keeps the water cleaner for longer.
Another reason I rely on it is protection. My thermal blanket helps keep out dust, leaves, and debris, so my hot tub is always ready when I want to use it. For me, it is a simple but important way to improve efficiency, reduce upkeep, and make my hot tub experience more enjoyable.
My Buying Guides on Hot Tub Thermal Blanket
When I started looking for a hot tub thermal blanket, I realized there were a few important things I needed to understand before buying one. A good thermal blanket can help keep heat in, reduce energy costs, and protect the water from debris. Here’s my personal buying guide based on what I would look for if I were choosing one again.
1. Material Quality
For me, the first thing I check is the material. I want a thermal blanket made from durable, heat-resistant foam or insulated vinyl that can handle constant exposure to warm water and chemicals. If the material feels flimsy, I know it probably won’t last very long.
2. Thickness and Insulation
I always pay attention to thickness because it affects how well the blanket holds heat. A thicker blanket usually provides better insulation, which helps my hot tub stay warm longer. That means less energy use and lower heating costs over time.
3. Size and Fit
Getting the right size matters a lot to me. If the blanket doesn’t fit my hot tub properly, heat can escape and the blanket won’t work efficiently. I always measure my hot tub carefully before buying so I can choose a blanket that covers the surface well.
4. Ease of Handling
I prefer a thermal blanket that is lightweight and easy to place or remove. Since I may need to take it off often, I don’t want something too heavy or awkward. A blanket that is easy to trim or fold can also be a big plus.
5. Durability and Longevity
I look for a product that can last through regular use, sunlight, and chemical exposure. A blanket with reinforced edges or UV resistance usually gives me more confidence that it will hold up longer and save me money in the long run.
6. Energy Efficiency
One of my main reasons for buying a thermal blanket is to save energy. I like to choose one that is designed to reduce heat loss effectively. The better the insulation, the less often my heater has to work, which is always a benefit.
7. Maintenance and Cleaning
I also think about how easy it is to clean. A good thermal blanket should be simple to wipe down and maintain. If it traps dirt or becomes difficult to care for, it can quickly become a hassle.
8. Price vs. Value
I don’t always go for the cheapest option. Instead, I look at the value I’m getting for the price. A slightly more expensive blanket that lasts longer and performs better is usually a smarter choice for me than replacing a low-cost one often.
9. Warranty or Guarantee
Whenever possible, I check whether the product comes with a warranty. A warranty gives me extra peace of mind and shows me that the manufacturer stands behind the product.
Final Thoughts
In my experience, the best hot tub thermal blanket is one that fits well, insulates effectively, and lasts through regular use. If I focus on quality, size, and durability, I can make a better buying decision and enjoy a warmer, more efficient hot tub.
Final Thoughts
I’ve found that a hot tub thermal blanket is a simple but effective way to help retain heat, reduce energy use, and keep the water cleaner. My takeaway is that it can make regular hot tub maintenance easier while also saving money over time. If I want a more efficient and enjoyable soaking experience, this is one upgrade I’d seriously consider.
Author Profile
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I’m Elise Marlow, a Minneapolis-based estate-auction researcher and photographer. Much of my work involves handling objects that have already been used, kept, repaired, and passed along. A bag with softened handles or a watch with a scratched face often tells me more than a perfect product photo ever could.
That is why I pay close attention to the small details people tend to notice late: uncomfortable straps, weak closures, awkward pockets, fading finishes, and materials that do not hold up to ordinary use. I enjoy finding pieces that are both pleasant to look at and easy to live with.
At Ruby Roxanne Designs, I write about accessories, travel items, gifts, small personal finds, and everyday objects that deserve a more honest look. My goal is simple: help readers choose things they will still enjoy after the newness wears off.
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