October 16, 2025
10 Best Best Thermal Blanket For Hot Tub of 2025
Last Updated - October 16, 2025
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Up to 11% off
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KETNET
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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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Why We Love It
- 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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Outdoor Inovations
Protect Your Cover and Save on Energy Bills with Outdoor Innovations Hot Tub Thermal Cover - Durable, Insulating Spa Blanket with Closed Cell Foam and Chemical Protection (7'x6'x3/8",)
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Main Highlights
- Floating Thermal Blanket: This floating thermal blanket is used to cover the hot tub while it is not in use. It keeps the chemicals inside from evaporating and the water hot for next use. It is also great for protecting the hard cover from evaporated chemicals
- Perfect Fit The thermaltech spa blanket is a perfect fit for square hot tubs of 7 by 6 feet. Just pop this on top of the filled hot tub, and job is done! It locks the heat of the water at the surface level and stops it from escaping
- Save Energy by reducing heat loss : Spa heating can be a costly affair which is why redoing it every now and again can feel like a hassle. With your thermaltech spa blanket you can save up by trapping the heat of the water inside the tub only
- Supplement to Hot tub cover : An essential requirement of this spa blanket is to protect the main hot tub cover from being subjected to evaporated chemicals and getting wet from the water inside
- Durable Material :Thermaltech foam used in making this product is a thick layer of covering 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 to protect your tub from any damage
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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)
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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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Our Rankings
UCEDER
UCEDER Insulated Hot Tub Cover 170G Polyethylene Thermal Insulation Spa Cover Protector Waterproof Hot Tub Cover Replacement,Energy-Saving and Eco-Friendly for Keeping Warm(76"x76"x35")
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Main Highlights
- Energy-Saving and Eco-friendlyThe waterproof hot tub cover is made of 170G top polyethylene material, providing excellent thermal insulation that helps reduce heat loss, save energy, and minimize your electricity bill, making it an eco-friendly option for your hot tub.
- Powerful FunctionsSpa cover protector can protect your Hot Tub from Dirt, Hot Sun,Dust, Rain, Hail, Bird Droppings etc.
- Hook and Loop ClosureExtra install door design makes customer very easy to install it and make the cap tighten.is Ideal for use on hot tub hard cover.
- Wind Belt DesignTwo stainless steel D-lockers are very easy to be loosed or tighten,it won't break.Allows adjustment for a tight in a harsh environment to prevent blow off.
- Warm TipsThe insulation is on the back-side instead of the top. If there is insulation on the top, it will not be waterproof.The cover not be used by itself without an insulated hard cover under it.
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Our Rankings
Gekufa
Hot Tub Bubble Blanket - 8 x 8 FT 16-Mil Square Pool Spa Solar Cover | Heavy Duty Floating Heat Retaining Thermal Blanket for Insulating Solar Heating （Gray）
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Main Highlights
- Energy Saving and Environmental ProtectionSolar pool covers use the power of sunlight to heat water, and you simply place it over your hot tub or pool to help retain heat, reducing evaporation and keeping your water clean. There's no need to refill even days after your last swim because we reduce water evaporation by 95% and you can reuse the water. So you can swim by heating the water ahead of time or keeping it warm after swimming and continue to enjoy swimming throughout the season.
- High-quality MaterialsSwimming Pool Solar Blanket is made of PE material, which is strong and lightweight, not easy to break or fade, and will not be damaged by soaking in water or in the sun. Will serve you long-term, and you can keep using it next summer.
- Can be cut at willYou can cut Solar Pool Blankets to the desired size and shape according to your pool/hot tub, big enough for your needs and replacements. Great for foot easy setups and metal frame round pools of all shapes! Insulated covers for in-ground and above-ground swimming pools.
- Wide ApplicationInground Swimming Pool Solar Blanket is a practical and useful accessory for swimming pools, hot tubs, spas, ponds, etc. It can not only absorb the heat of the sun during the day, reduce water evaporation, but also keep the pool water clear. Keeping your pool free of debris and leaves when not in use can help keep your pool free of dirt and away when not in use.
- 100% Satisfaction GuaranteeYou can decide the Hot Tub Solar Cover quality and performance. If you are not satisfied with your purchase for any reason, simply contact us for our 100% satisfaction guarantee, which means there is no risk for you to try today!
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Our Rankings
MADHOLLY
Spa and Hot Tub Cover - 7 × 7 FT 16-mil Square Hot Tub Thermal Insulation Solar Blanket Bubble Cover, 210 × 210 CM
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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. (Tips: The cover may have creases from folding. Lay it flat and place heavy objects on top for a few hours to help it flatten out).
- 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.
- 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.
- 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.
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Our Rankings
RGJ
8 x 8 FT Spa and Hot Tub Cover, 16Mil Square Hot Tub Thermal Blanket, Insulation Solar Blanket Bubble Cover for Energy Efficiency & Safety
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Main Highlights
- 16MIL Thick Material: Our solar pool cover is made of safe, reusable PE material, compared to most of the 8-12 MIL thickness, our thickness is 16MIL, so we can heat water faster and reduce heating costs
- Insulation: Our solar blanket is composed of thousands of tiny bubbles, which can absorb the heat of the sun, reduce heat loss at night, and effectively increase the water temperature according to environmental conditions. The black color has a better insulation effect
- Reduce Water Evaporation & Keep the Water Clean: Our pool solar cover can reduce 95% of water evaporation, reduce the number of times you add/change water, save water resources, and prevent fallen leaves/dust/insects from entering, ensuring the cleanliness of the water, allowing you to enjoy the spa bath more comfortably
- Easy To Cut: Our hot tub cover is easy to cut, so you can match hot tubs, bathtubs, massage pools, etc. of different sizes and shapes. When using, the bubble side faces the water surface
- Longer Service Life: Our spa covers has excellent tensile and tear resistance, is strong and sturdy, not easy to break, and is not easy to fade and deform even under strong sunlight, and can be reused for a long time. Foldable storage, does not take up too much storage space.
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Our Rankings
BigXwell
BigXwell Solar Pool Cover, Hot Tub Bubble Blanket,16-mil 7x7 Foot Square Spa Cover Hot Tub Solar Blanket, Heavy-Duty Heat Retaining Thermal Blanket
5% OffFree Shipping
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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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Our Rankings
AllAreN
AllAreN Hot Tub Bubble Cover, 7x7 Foot Hot Tub Thermal Blanket Square Solar Cover Insulation Blanket for Outdoor Hot Tub
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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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Our Rankings
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.
