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7 best hot tub thermal blankets to keep jacuzzi safe

Will you spend 40 hours choosing which hot tub thermal blanket is better, $39 or $64? We did it. Find out how to cut the hot tub bill and maintenance costs.

You may want to pay less on the bills, or you may want to do a zero carbon footprint. In both cases, it would be better to have a qualitative hot tub thermal blanket.

It will not only reduce bills but also:

  • The water heats up faster (it minimizes heat loss and you faster have a hot jacuzzi);
  • The water under the blanket will cool more slowly;
  • Environment-friendly solution (because of consumption reducing);
  • Extend the life of the cover (protects from holes both inflatable and plug & play hot tubs).

So, in addition to reducing bills and costs, a spa thermal blanket will help your hot tub cover not get moldy and be longer without damage.

Moreover, today we will tell you which thermal blanket you DO NOT need to buy.
Let’s discover how to decrease your bills (some customers managed to cut it in half) with your cover and some hot tub thermal blankets.

7 best hot tub thermal blankets: 👇 comparative table

Model
Detail
Spatender foam hot tub blanket

Top pick
Winner in the categories:
“Warmth preservation & Easy to fit”

Color: White-yellow;
Material: Foam;
Dimensions:  7'x6';   7'x7'; 
Shape: Rectangle;
Thickness: 3/8";
Weight: From 2.22 kg.

Benefits:
• One-piece blanket (cannot delaminate);
• Fits 95% of all hot tubs;
• Easy to cut.

Endothermic Protector Hot Tub Thermal Blanket

Winner in the category:
“Water level retention”

Color: White;
Material: PE (polyethylene);
Dimensions:  118";   94";   72";   59.8";    48"; 
Shape: Round;
Thickness: 3/8";
Weight: From 0.4 kg.

Benefits:
• Withstands exposure to UV radiation (prevents evaporation);
• Warm water w/out electricity (use the sun’s rays);
• Protects your jacuzzi from leaves and debris.

Bubble & aluminum hot tub thermal blanket

Winner in the category:
“Cover protection”


Color: Silver;
Material: LDPE;
Dimensions:  156”x78”;   78”x78”;   126”x63”;   263”x63”; 
Shape: Rectangle;
Thickness: 3/8"; 6/8"
Weight: From 0.5 kg.

Benefits:
• Made of human safe and odorless materials;
• High-quality and durable construction;
• Easy to store.

Space Age hot tub thermal blanket

Winner in the category:
“Functional and nice-looking design”


Color: Blue;
Material: Polyethylene;
Dimensions:  12'x24’;   14'x28’;   16'x32’;   18'x36’;   20'x40’; 
Shape: Rectangle;
Thickness: 4/8"
Weight: From 0.8 kg.

Benefits:
• Reduces time spent on garbage collection;
• Chemicals are used more economically;
• More efficient heat retention (with the aluminum heat shield).

Blue Wave hot tub thermal blanket

Winner in the category:
“Debris protection”


Color: Blue or Clear;
Material: Plastic;
Dimensions:  12';   15';   18';   21';   24';   28';   30';   33'; 
Shape: Round;
Thickness: 4/8"
Weight: From 1.3 kg.

Benefits:
• Thermal cells trap heat;
• Retain warmth on cool cloudy days;
• Prevents water and chemical evaporation.

Solar Sun Rings hot tub thermal blanket

Winner in the category:
“Wind resistance”


Color: Blue;
Material: Plastic;
Dimensions:  60”; 
Shape: Round;
Thickness: 3/8"
Weight: 1.4 kg.

Benefits:
• Easy to install and remove;
• Compatible with automatic pool cleaners;
• Easy to clean.

Intex Solar hot tub thermal blanket

Winner in the category:
“Warming up”


Color: Blue;
Material: Plastic;
Dimensions:  12’; 
Shape: Round;
Thickness: 4/8"
Weight: 1.1 kg.

Benefits:
• Made from premium quality materials (increases the service life of the blanket);
• Includes a reusable carry bag for storage;
• Drain holes (prevents water accumulation).

We also filtered out unscrupulous sellers and goods of terrible quality.

Top engineer’s and customer’s tips on choosing a hot tub thermal blanket

If you want to enjoy the jacuzzi as long as possible and as cheaply as possible, then you need to use it carefully and know how to maintain it properly.

Check the Hot Tub Maintenance Guide 

The ideal hot tub kit consists of 3 elements: an inner hot tub thermal blanket, a cover, and a waterproof protective fabric.
It’s not for me to tell you about what harsh winter weather can do with an outdoor jacuzzi — freezing rain, ice sticking, wind, and sleet.

Typical winter view for a hot tub owner in Canada

Perhaps, somewhere in Miami, people are less concerned about this problem, but for Canada, this issue is important.

Are hot tub thermal blankets worth it?
To understand whether it is worth buying a thermal blanket, let’s figure out how it works.

Each of the hot tub thermal blankets we tested is a thin flat sheet that floats on the surface of the water in the jacuzzi.
It can be of different colors, densities, and have different features.
But their main characteristic is the same.
Hot tub thermal blankets cover the maximum area of the jacuzzi, thereby reducing water evaporation and protecting the water from various debris (branches, leaves, insects, etc.).

I am exhausted after catching 100500 micro flies from the hot tub

If you use a jacuzzi with a reinforced cover

Like this inflatable Intex 4 Person Hot Tub Spa with Energy Efficient Cover

or if you have such a hard cover for a plug & play hot tub

We recommend that you purchase the thinnest Blue Wave single-layer hot tub thermal blanket, which will be equipped with additional heating features.
It makes sense because your jacuzzi is already equipped with powerful thermos in the form of a super-cover.

So, to use your reinforced cover more carefully, you need to protect it from the effects of chemicals. Water with chemicals constantly affects the closed cover, and then you open it and the water evaporates, and the chemicals remain on the lid, which leads to material degradation over time. It becomes more fragile and wears out.

However, this can be easily avoided for $50-200.

Once I was at a seminar I heard about an interesting deal. Then the lecturer asked: raise your hand, who would like to earn + 25% on this? / + 50% / + 75%?
I raised my hand to 75%.
“Well, we have identified the most greedy person among us” — said the coach.

Yes, this blanket is for those greedy like me, because I don’t want to waste a drop of water and chemicals.

I do it this way.
I turn on the jacuzzi, heat it to the temperature I want, open the cover. I go to the jacuzzi, enjoy a wonderful massage …
And it’s time to remember that I forgot to take my phone/book /snacks/slippers/beany. Anything.

I almost always forget something.

At this moment I usually put on a bathrobe and place a blanket on the jacuzzi. Believe me, I am an ordinary person and I am too lazy to close and open this cover every time.

A hot tub thermal blanket will keep the water warm and nothing will evaporate from the jacuzzi (no water or chemicals) while you search for a pillow/snacks/whatever to maximize your relaxation.

How to choose a hot tub thermal blanket

if you have a regular cover (both for inflatable and plug & play hot tubs)

Usually, a regular cover is included with the hot tub — it is a durable fabric that adheres tightly to the top of the jacuzzi.

If you brew tea and cover it with a lid, then condensation (moisture droplets) forms on it, the same thing happens with the jacuzzi.
The temperature and humidity outside are constantly changing, which leads to constant uneven evaporation of water.
Condensation accumulates under the cover.
Then you open it and this water flows off somewhere.
While the chemicals are drying on the cover and this causes it to wear out.

As a result, you need to add chemicals and heat the water, wash the lid, otherwise, it will discolor and wear out faster.

To reduce heat loss, simply place the thermal blanket directly into the water.
This is a small sheet of plastic the size of your hot tub.
The water will no longer evaporate.

Total insulation: inflatable reinforced cover + hot tub thermal blanket

If you want total insulation then order a reinforced cover.
This is an inflatable liner that will not allow the jacuzzi to cool down.

However, the disadvantage of inflatable covers is that micro-cracks, holes, or scratches on them are almost impossible to notice.

If it is still possible to find and fix a hole in the jacuzzi, then the cover does not leak, and analyzing heat loss with a thermographic camera is at least strange.

That is why we recommend just adding a Blue Wave single layer hot tub thermal blanket and you will keep your cover safe (and get maximum comfort for the minimum money).

How to measure your hot tub properly

Very obvious and extremely important point.

Since the hot tub thermal blanket fits only inside the jacuzzi, then you need to measure the inner size of the jacuzzi.

For example, a 6-person inflatable Intex hot tub has an internal diameter of 65 inches. The 4-person Intex inflatable jacuzzi has an inner diameter of 57 inches.

Does a hot tub thermal blanket have to fit exactly?

We have created a spreadsheet for you with popular jacuzzi models and hot tub thermal blankets that are better to choose from.

Hot tub modelHot tub thermal blanket
Intex 4-person 77” Round inflatable hot tubSquare 6’x6’ Spatender foam hot tub blanket
Intex PureSpa 6-person Round inflatable hot tubRound Blue 12’ Intex Solar hot tub thermal blanket
Coleman SaluSpa 71" Round AirJet Inflatable Hot Tub, 2-4 Person — BahamasRectangle 12'x24’ Space Age hot tub thermal blanket
Coleman SaluSpa Round Inflatable 6-person Hot TubRound White 59.8” Endothermic Protector Hot Tub Thermal Blanket
Coleman Square 4-person inflatable hot tubSquare 78”x78” Bubble & aluminum hot tub thermal blanket

Also do not forget that the hot tub thermal blanket must match the size of the jacuzzi.

This rule is true for solar rings, foam blankets, but if you buy a blue bubble blanket, then you will also need to fix it. So that it does not blow away with the wind and so that it does not spin inside the jacuzzi when you turn on the pump. This is very important, several blankets have died like that.

Therefore, we recommend that you pick up the blue bubble hot tub thermal blanket a few inches larger.

Detailed overview of the best hot tub thermal blankets 

Spatender foam hot tub blanket

🚀Top pick🚀
Winner in the categories:
“Warmth preservation & Easy to fit”

Foam floating thermal spa blanket is the most personalized (completely individual) option. It is much more convenient to fit your hot tub to the nearest millimeter. This is more accurate than plastic hot tub blankets (even if your jacuzzi is heart-shaped).

Also due to the different structure of the material (it is thicker and less sliding), it will better adhere to the surface, not wrinkle, bend or move under a slight breeze.

To prevent it from being blown away by a strong wind, just put a stone or something else heavy on top (such a life hack will not work with plastic film, but it has its advantages, which we will also talk about later).

1. So here’s what one of the customers is talking about:

  • His bathtub is located outdoors (in a desert at 5,000 feet elevation о_О) and has no other covers other than this one.
  • He used bromine to purify water.
  • The bath is in direct sunlight 10 hours a day.
Day air temperature
Day water temperature
82-84 °F
75-80 °F
Air temperature at night
Water temperature at night under the cover
50-60 °F
75-78 °F

☝️ seems like it works well. 
During the day, his bath is a little cooler than the air and helps to freshen up, and in the evening it is warm.

2. Another regular foam customer has been using it for over three years. It finally became more brittle and he replaced the thermal blanket with a new one (the same, of course). He also said that even though it seems thick and voluminous, it is easy to take it off and place it back in the hot tub.

3. Customer Ryan agreed with the opinion of other users that the foam is high quality. It protects the more expensive hot tub cover from moisture and chemicals well.
This prolongs the life of the cover, the fabric does not thin or degrade.

Things to consider: This closed-cell foam hot tub blanket is only available in one color.
During the first days of use, the color of this blanket will change when exposed to sunlight and chemicals from your hot tub.
From yellowish, it will become white (in our opinion, it becomes more attractive).
The color change does not affect performance.

Also, since this foam will come to you folded, it will most likely have a crease in the center, but this should not scare you, because it does not affect its effectiveness.
The foam remains flexible for many months.
And there are no soldered or glued elements, which is safer for your health and the environment.

As we mentioned before, this model is available in several sizes.
Choose the closest to what you need and create your unique, perfect-fitted blanket.

6×7 blanket
6×6 blanket

Bubble & aluminum hot tub thermal blanket

Winner in the category:
“Cover protection”

This hot tub thermal blanket is one of the thickest among the combined type blankets (which not only retain water but also warm it).
Due to the materials, it is made from, it is only available in one silver color.
We remind you that such blankets should always be placed with the gray cover facing up.

Bubble & aluminium hot tub thermal blanket is available in 4 sizes:
S: 160x160x1cm; M: 320x160x2cm; L: 200x200x2cm; XL: 400x200x2cm.
However, we do not recommend buying the S size because they are 2 times thinner.

Unlike the foam model, this model does not lose its shape when folded, it is convenient to store it folded. It is compact and does not take up much space.

Such blankets are eco-friendly because they reduce consumption.
This reduces the evaporation of water and converts the sun’s rays into heat, which warms the surface of the water under the blanket.

Endothermic Protector Thermal Blanket 

Winner in the category:
“Water level retention”

This thin sheet is called a hot tub thermal blanket because it retains heat. This is because it covers the maximum area. In this way, it reduces evaporation by up to 95%. Since water ceases to come into contact with air.

These round blankets are available in several sizes.
Dia: 122cm/48inch, 152cm/59.8inch, 183cm/72inch.

You can place them under a hot tub cover when not in use, or place them on the water in warmer weather to prevent cooling or evaporation.

Due to exposure to UV radiation from the sun, water evaporation may increase, therefore it is recommended to cover the jacuzzi with this blanket, which will also help maintain the water temperature.
It is recommended to secure the blanket with a wear-resistant rope. This will help to keep it from being blown away by the wind, and it will also protect your jacuzzi from leaves and debris.

Space Age hot tub thermal blanket

Winner in the category:
“Functional and nice-looking design”

This blanket is also made of an aluminum layer and a polymer layer, but unlike model #2 (Bubble & aluminum thermal blanket) it consists of only two layers. Its thickness is 12 millimeters.

Customers rate this blanket as one of the most beautiful solar blankets.
The material used for the cover is very good; thick and sturdy, but not too heavy. Easily cut to size with standard scissors and looks very nice when installed. It has sufficient buoyancy and remains on the surface of the water unless it is raining heavily.

Also, several users at once shared that the use of this blanket has reduced their heating costs in half. They also said it could last 30% longer than the thinner blue solar blanket.

Plastic Single Layer Thermal Blankets

Blue Wave: Blue or Clear hot tub thermal blankets

Winner in the category:
“Debris protection”

You can choose the blanket according to the shape and size of your jacuzzi

Blue Round hot tub thermal blanketRoyal Blue Rectangle hot tub thermal blanketClear Round hot tub thermal blanket
Sizes:
12-feet; 15-feet; 18-feet; 21-feet; 24-feet; 30-feet; 33-feet.
Size: 7-ft x 8-ftSizes:
15-feet; 18-feet; 21-feet; 24-feet; 28-feet; 30-feet.

This is a classic solar blanket.
Solar blankets work differently than foam.
They are more designed to not only maintain the temperature of the water but also to heat it using solar heat, which they accumulate and transfer to the water.

By the way, some customers have shared the following life hack for the summer:
Once a day, without removing the blanket, turn on the pump so that it mixes the water in and after 3 days you will heat all the water by several degrees because this blanket accumulates solar heat and maintains the water temperature even at night.

Customers note that Blue Wave hot tub thermal blanket is the most convenient for garbage collection. Dirt does not spread over, and this blanket is also lightweight and easy to twist, remove to wipe, or spray from a hose.

Also, this blanket retains heat well. Here’s an experience one customer shared.👇

At a water temperature of about 22-23°C, the water began to evaporate intensively. After I covered this with a blanket for a day, the water temperature rose to 28°C and remained at about the same level.
If you leave the pool under the blanket and there are cloudy days, the water temperature will slightly decrease or remain at the previous level.

So, you can buy a rectangular hot tub thermal blanket of normal quality, it will be convenient to cut it to the size of your jacuzzi.

Intex solar hot tub thermal blanket

Winner in the category:
“Warming up”

However, if you want a premium quality blanket, we recommend that you purchase an Intex solar blanket.
They are more wind-resistant and in general, users recommend them as more durable and wear-resistant solar blankets.
It can also be cut and fit for your size with ordinary scissors.

Solar Sun Rings hot tub thermal blanket

Winner in the category:
“Wind resistance”

These blankets are the most varied and vibrant.

Solar Sun Rings hot tub thermal blanket

Also, for your convenience, these hot tub thermal blankets (also known as solar rings) can be with inflatable edges so that you do not have to think about how to fix them.
Moreover, they can be equipped with metal “anchor” magnets, and their shape is thought out in such a way that they remain on the water no matter what.

Things to consider: Remember they cannot be trimmed like the Blue Wave hot tub thermal blanket so you need to choose a blanket that is NOT larger than the inner diameter of your hot tub.

Updated inner lattice with added drain bushings allows water to seep through the sun rings, making them more resilient as well.

Additional stuff to make your jacuzzi and thermal blanket longeval

  1. If you have an inflatable hot tub and you want to cut your bills several times, we recommend that you purchase a reinforced cover.
  2. To make your hot tub thermal blanket 100% wind resistant, we suggest that you additionally fix it.
  3. As we mentioned above, for the hot tub to serve you as long as possible, you need to use it carefully. Cover it with a fabric to avoid holes and scratches from freezing rain, snow and to prevent your jacuzzi from thinning or fading under UV light.

CosySpa Energy Saving Hot Tub Spa Cover

  • 2 Sizes: 4/6 person;
  • Quick and simple to inflate;
  • Cut downs on the number of filters used.
Show price

Intex Pure Spa Deluxe Cover, Tan, 77″

  • Extra insulation with the High-Density Thermal-Resistant foam;
  • Up to 50% more energy efficient than standard cover;
  • Protects spa from punctures, scratches, and weather damage.
Show price

ULTCOVER Waterproof 600D Polyester Square Hot Tub Cover

  • 5 Sizes: 76”; 80”; 85”; 90”; 95”;
  • Top-quality 600D polyester canvas;
  • Waterproof and breathable.
Show price

Paracord Kimaru wear-resistant rope

  • Available in 7 colors;
  • High-quality nylon material;
  • UV (and discoloration) resistant and will not rot or become moldy.
Show price

Final thoughts on hot tub thermal blankets

We hope we’ve told you that not every blanket will be a good choice for you. However, if you read our guide carefully, now you understand how to choose the best thermal blanket for your jacuzzi.

If we could only give you 3 tips, then we would say:

  • Pay attention to what cover you already have (regular fabric or reinforced). Depending on this, take a thicker (like Spatender foam) or thinner (like Intex solar) blanket, respectively.
  • Measure the inside dimensions of the jacuzzi correctly. So that you can choose a perfect fit hot tub thermal blanket.
  • Enjoy a warm, clean hot tub, lower water, electricity, and chemical bills.

All best hot tub thermal blankets from the review

Spatender foam hot tub blanket
🚀Top pick🚀
Winner in the categories:
“Warmth preservation & Easy to fit”
Endothermic Protector Hot Tub Thermal Blanket
Winner in the category:
“Water level retention”
Bubble & aluminum hot tub thermal blanket
Winner in the category:
“Cover protection”
Space Age hot tub thermal blanket
Winner in the category:
“Functional and nice-looking design”
Blue Wave hot tub thermal blanket
Winner in the category:
“Debris protection”
Solar Sun Rings hot tub thermal blanket
Winner in the category:
“Wind resistance”
Intex Solar hot tub thermal blanket
Winner in the category:
“Warming up”

FAQ

🚀What is the best hot tub thermal blanket?

Spatender foam hot tub thermal blanket. Since the main task of the thermal blanket is to preserve and maintain heat, this model is the undoubted leader. More than 73% of customers note it as the most effective when it comes to reducing electricity bills.

✔️What are the best hot tub thermal blankets?

#1 – Spatender foam hot tub thermal blanket – Winner in the categories “Warmth preservation & Easy to fit”. #2 – Endothermic Protector hot tub thermal blanket – Winner in the category “Water level retention”. #3 – Intex Solar hot tub thermal blanket – Winner in the category “Warming up”.

☀️What hot tub thermal blanket is the best for heat retention?

Spatender foam hot tub thermal blanket. Over 80% of customers said this hot tub thermal blanket retains heat better than other thermal blankets.

💧What is the best hot tub thermal blanket for water level retention?

Endothermic Protector hot tub thermal blanket covers the maximum area. In this way, it reduces evaporation by up to 95%. Since water ceases to come into contact with air.

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