10 Best Best Hot Tub Thermal Blanket of 2025

Tested and Reviewed: Top 10 Best Hot Tub Thermal Blanket deals with expert ratings from 8.1 to a perfect 10

July 2025 Edition

Editor's Choice

9.7

Spatender

Floating Thermal Hot Tub Blanket 6'x6' x3/8", Summer or Winter,Closed Cell Foam Durable, Floating, Insulating Spa Blanket Protector for Spa Hot Tub Cover (, Cream)

Editor's bottom line:

“This best hot tub thermal blanket is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

DURABLE MATERIAL:TheThermaltech foam used in making this product is a 3/8" thick layer of high density foam to protect your hot tub from damage and save you from needless spa heating expenses. It is strong enough to endure the changes in weather and to help protect your Hard tub Cover from chemical damage
PERFECT FIT: The Spatender spa blanket is a perfect fit for most hot tubs of . Just pop this on top of the filled hot tub cut with scissors , and the job is done! It locks the heat of the water at the surface level and stops it from evaporating .
SAVE ENERGY BY REDUCING HEAT LOSS: Spa heating can be a expensive which is why an investment in a thermal cover will save you money. With your Spatender spa blanket you can save by trapping the heat of the water inside the tub . Most of the heat is lost through evaporation which is greatly reduced by the cover
GREAT FOR SUMMER OR WINTER :Why not keep the heavy clunky hard cover in the garage for the summer ? Not only does the thermal cover keep the tub warm on cool nights but it look so much nicer and keeps any debris from falling into the spa.
PROTECT YOUR EXPENSIVE HARD COVER: Hot tub covers are expensive ! Spatender thermal cover will help protect your hard cover from damage by harsh chemicals and gases. because the cover floats on the water it helps prevent evaporation which causes gases that will deteriorate your cover and head rests .

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Picked by 304 people today

9.5

Angooni

Angooni 8x8FT Hot Tub Thermal Blanket - 16 Mil Hot Tub Bubble Cover, Thermal Solar Blanket for Insulating Square Inflatable Spas, Hot Tub Pools(244x244cm)

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Main Highlights

- Cost-Effective Hot Tub Thermal Cover: Save on utility bills with thermal blanket that reduces water evaporation by up to 95%. Designed to float on the water surface, its bubbles effectively capture and transmit solar energy to optimize heating speeds, also decreasing the time cost.
- Multi-Functional Protection: Protect your hot tub from debris, including leaves, dirt, dust, and small animals like ducks. Our thermal blanket for hot tub enhances cleanliness and reduces maintenance effort, ensuring your spa remains pristine.
- Superior 16MIL Thickness: Beat the 8-12 mil hot tub insulation blanket on the market, our cover is more reliable. It is less prone to tearing, and the air bubbles are less likely to burst, further ensuring that our hot tub blankets are better insulated.
- Easy to Cut & Fit: Designed for convenience, this 8x8 FT hot tub bubble cover is easy to trim and install, allowing for a snug fit within your hot tub. For optimal performance, remember to position the bubble side facing down.
- Versatile Applications: Ideal for various water features such as in-ground spas, hot tubs, and stock tank pools, this hot tub thermal blanket offers unparalleled solar heating benefits, making it a must-have for any water enthusiast.

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9.5

AllAreN

AllAreN Hot Tub Insulation Blanket, 10x10 Foot Hot Tub Thermal Blanket Square Solar Cover Bubble Cover for Outdoor Hot Tubs

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Main Highlights

Energy Saving and Efficiency Improvement: The hot tub solar blanket can greatly shorten the heating time, and the solar cover insulation retards the heat release, avoiding wasting your money on continuous heating
Reduce Water Evaporation: Spa and hot tub blanket can effectively prevent up to 95% of the water from evaporating,Ensuring enough water to be recycled and avoiding the waste of resources caused by frequent water additions
More Uses: Hot tub bubble blanket absorb solar energy to heat water and keep your pool warm at all times.Spa solar bubble cover prevents debris and leaves from falling into the pool and keeps the water clear.It is a good helper to maintain the swimming pool
Easy to Cut: If your tub is irregularly shaped, you can put the solar spa cover on the hot tub first, then make a mark and cut along the mark.Our spa bubble blanket perfect for in-ground or above-ground hot tub or swimming pools,outdoor hot tub spa, bath tub, massage pool, swimming pool
Perfect Experience: 10 Mil thickness,anti-wear,light,soft and good toughness,perfect fit to the water surface,easy to fold and store,long service life,our spa bubble cover film makes you feel more secure

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9.2

MADHOLLY

Spa and Hot Tub Cover - 7 × 7 FT 16-mil Square Hot Tub Thermal Insulation Solar Blanket Bubble Cover, 210 × 210 CM

Free Shipping

Main Highlights

Bubble-side Down: When using, you need to put the bubble side of the solar blanket for hot tubs close to the water surface, with the smooth side facing up, which can also play a role in preventing dust, reducing condensation and freezing on the edge.
16 MIL Thickness: Different from the general 8-12 mil spa hot tub solar blanket, we use a thicker material of 16 mil, which has better heat preservation and water retention effect, the bubbles will not crack or fall off, and the square solar cover can be used for a long time.
Save Time & Money: When you heat the water in your hot tub, putting our thick bubble hot tub cover on it can greatly shorten the heating time, and it also saves you money to some extent. Besides, using the blanket cover can effectively cut down the condensation on your hot tub cover.
More Functions: Covering the square solar cover on the hot tub can not only effectively prevent up to 95% of water evaporation loss, but also maintain the water temperature and absorb the heat energy of the sun's rays to heat the water, reducing the time you need to heat the water in the next time.
Trim to Fit: Our thermal solar blanket cover is 7 × 7 ft/210 × 210 cm and fits most square hot tubs. If your tub has more irregular shapes, you can put the cover over the hot tub first, then make a mark and cut along the mark.

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9.0

BigXwell

Hot Tub Bubble Blanket,16-mil 7x7 Foot Square Spa Cover Hot Tub Solar Cover, Heavy-Duty Heat Retaining Thermal Blanket.

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Main Highlights

Transform Your Backyard Experience : BigXwell hot tub bubble blanket maximizes heat retention, slash heating time & boost warmth retention!ensuring,your spa remains invitingly warm. Experience the serenity of steaming waters even in the chill of winter without the wait.
Energy Efficient: Say goodbye to sky-high heating bills! BigXwell hot tub cover significantly reduces heat loss, minimizing the energy required to keep your hot tub toasty.Enjoy long, luxurious soaks without the financial stress.
Custom Fit: Tailored for perfection, our spa cover is designed to fit most spa sizes seamlessly, providing an airtight seal that further enhances insulation and efficiency.
Durable: Its robust design ensures it remains a staple in your hot tub setup through every season.
Elevate your spa sessions with the BigXwell spa Cover, designed specifically for the discerning homeowner looking to optimize their backyard oasis.

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8.8

KETNET

KETNET 7x7 Ft Solar Hot Tub Cover Spa Bubble Covers Blanket for 7 x 7 Foot Square Hot Tub SPA Bubble Wrap Small Pool Cover Protector, 15-Mil Circle Thermal Insulation Floating Blankets (84 x 84 Inch)

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Main Highlights

Keep Your Hot Tub Water Clean & Warm: KETNET Solar bubbles hot tub spa covers can keep the water temperature. Don't need to add or change water even passed a few day for last use because we can reduce water evaporation by 95% and keep dirt away. So you can keep enjoy your spa bath in the whole season
Heavy-duty 15 MIL Thickness: Most of the hot tub spa blankers on the market are 8-12 MIL thick. Our solar pool covers are 15 MIL thick, so our hot tub spa covers can heat up the water faster
Perfect for Inground or Above Ground Hot Tub or Swimming Pools: Perfect for almost kinds of inflatable outdoor hot tub spa, bath tub, massage pool, swimming pool on market.
How to Use: When you heat the water in your hot tub, putting our bubble hot tub cover on it can greatly shorten the heating time. When you don't use your hot tub, putting on it will reduces evaporation heat loss up to 95% and keep dirt away. Important: Bubble-side Down when use
Easy Trim to Fit Different Shapes Hot Tub or Pool: This thermal solar blanket cover is 7 × 7 ft/210 × 210 cm and fits most square hot tubs. For the uniquely shaped hot tub or pool, have the bubbles facing down to the water and trace a line on the cover showing where you should cut off the additional material

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8.6

SummerCool

Hot Tub Thermal Blanket Bubble Cover 16 Mil Insulation Blanket,6ft x 6ft Floating Spa Solar Blanket

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Main Highlights

Floating thermal blanket for hot tub 6ft x 6ft
Hot tub bubble cover is made of long-lasting heavy duty PE( 16 Mil thick)material, safe and environmental protection.
Cut to fit.Easy to trim with scissor and easier to deal with than a big foam cover.
It helps retain the heat throughout the night. it also helps reduce the amount of time to run the pool heater.
Prevent up to 95% of water and chemical evaporation with the use of a solar blanket.

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8.3

Kestnsee

Kestnsee Solar Hot Tub Spa Bubble Covers Blanket 6 x 6 FT for Square Inflatable Hot Tub Spa Pool Thermal Insulation Floating Bubble Wrap Covers (183 x 183cm)

Free Shipping

Main Highlights

Hot Tub Spa Water Thermal Insulation: Solar bubbles hot tub spa covers can float on water to keep the water temperature during heating or not use. Don't need to add or change water even passed a few day for last use because we can reduce water evaporation by 95% and keep dirt away. Reducing the time you need to heat the water in the next time
16 MIL Thickness: Most of the hot tub spa blankers on the market are 8-12 MIL thick. Our solar pool covers are 16 MIL thick, so our hot tub spa covers can keep the water warm longer. The bubbles will not crack or fall off, and the square solar cover can be used for a long time
Bubble-side Down: When using, you need to put the bubble side of the solar blanket for hot tubs close to the water surface, with the smooth side facing up, which can also play a role in preventing dust, reducing condensation and freezing on the edge
Perfect for Inground or Above Ground Hot Tub or Swimming Pools: Perfect for almost kinds of inflatable outdoor hot tub spa, bath tub, massage pool, swimming pool on market
Trim to Fit: Our thermal solar blanket cover fits most 1-4 people hot tubs. If your tub has more irregular shapes, you can put the cover over the hot tub first, then make a mark and cut along the mark
Make Sure Accurately Measure & Choose Right Size: Please be sure to accurately measure the inner diameter of your hot tub and choose the right size specifications

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8.1

AURSK

AURSK SPA and Hot Tub Bubble Cover, 12mil 7x7 Foot Square Hot Tub Thermal Blanket,Insulating Blanket for Outdoor Hot Tubs,Blue

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Main Highlights

Faster heating rate - naturally! Tired of waiting for hours by the hot tub? The solar blanket of this hot tub absorbs sunlight well and increases the temperature by 30% faster. Perfect for relaxing after a long day or inviting friends for a cozy spa night in the backyard.
Lock in the warmth like a thermos - even when it's snowing! The thick insulation of this hot tub bubble cover holds your hot tub tightly like clothing. Wake up on a frosty morning and jump into warm water, or take a sneaky dip in the middle of the night - no reheating required. Winter has met its match!
Bye-Bye, leaf soup! Say goodbye to the leaves in the bathtub!" This sturdy shield can block falling debris, leaves, pollen, and even naughty little animals. Keep your spa clean, whether it's under the maple trees or under the city sky.
Custom Fit in 5 MinutesNo Pro Skills Needed! Round, oval, hexagon?Grab scissors, measure once, and trim!Snug as a glove, zero gaps.No more wrestling with bulky one-size-fits-none covers!
Tougher Than a Cowboy Boot! Rain, UV rays, Bad weather?Bring it on!High-strength anti-aging PE materials laugh at weather tantrums.The 12MIL gold thickness is both effective and cost-effective, and will last several years longer than other frailty covers - your hot tub's forever wingman.

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8.1

Kestnsee

Kestnsee Hot Tub Spa Solar Bubble Cover Blanket for Round Inflatable Hot Tub Spa Pool Thermal Insulation Floating Bubble Wrap Covers (4.7 Ft)

Free Shipping

Main Highlights

Hot Tub Spa Water Thermal Insulation: Solar bubbles hot tub spa covers can float on water to keep the water temperature during heating or not use. Don't need to add or change water even passed a few day for last use because we can reduce water evaporation by 95% and keep dirt away. Reducing the time you need to heat the water in the next time
16 MIL Thickness: Most of the hot tub spa blankers on the market are 8-12 MIL thick. Our solar pool covers are 16 MIL thick, so our hot tub spa covers can keep the water warm longer. The bubbles will not crack or fall off, and the square solar cover can be used for a long time
Bubble-side Down: When using, you need to put the bubble side of the solar blanket for hot tubs close to the water surface, with the smooth side facing up, which can also play a role in preventing dust, reducing condensation and freezing on the edge
Perfect for Inground or Above Ground Hot Tub or Swimming Pools: Perfect for almost kinds of inflatable outdoor hot tub spa, bath tub, massage pool, swimming pool on market
Trim to Fit: Our thermal solar blanket cover fits most 1-4 people hot tubs. If your tub has more irregular shapes, you can put the cover over the hot tub first, then make a mark and cut along the mark
Make Sure Accurately Measure & Choose Right Size: Please be sure to accurately measure the inner diameter of your hot tub and choose the right size specifications

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Our Best Overall Choice

Best Choice

9.7

Spatender

Floating Thermal Hot Tub Blanket 6'x6' x3/8", Summer or Winter,Closed Cell Foam Durable, Floating, Insulating Spa Blanket Protector for Spa Hot Tub Cover (, Cream)

Editor's bottom line:

“This is the best one we tested. In terms of quality, brand and price, we couldn't ask for more.”

Main Highlights

DURABLE MATERIAL:TheThermaltech foam used in making this product is a 3/8" thick layer of high density foam to protect your hot tub from damage and save you from needless spa heating expenses. It is strong enough to endure the changes in weather and to help protect your Hard tub Cover from chemical damage
PERFECT FIT: The Spatender spa blanket is a perfect fit for most hot tubs of . Just pop this on top of the filled hot tub cut with scissors , and the job is done! It locks the heat of the water at the surface level and stops it from evaporating .
SAVE ENERGY BY REDUCING HEAT LOSS: Spa heating can be a expensive which is why an investment in a thermal cover will save you money. With your Spatender spa blanket you can save by trapping the heat of the water inside the tub . Most of the heat is lost through evaporation which is greatly reduced by the cover
GREAT FOR SUMMER OR WINTER :Why not keep the heavy clunky hard cover in the garage for the summer ? Not only does the thermal cover keep the tub warm on cool nights but it look so much nicer and keeps any debris from falling into the spa.
PROTECT YOUR EXPENSIVE HARD COVER: Hot tub covers are expensive ! Spatender thermal cover will help protect your hard cover from damage by harsh chemicals and gases. because the cover floats on the water it helps prevent evaporation which causes gases that will deteriorate your cover and head rests .

Show Price

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