The 11 best thermal blankets for hot tubs of 2025

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

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.

Energy-Saving and Eco-friendly：The waterproof spa 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 Functions：Spa cover protector can protect your Hot Tub from Dirt, Hot Sun,Dust, Rain, Hail, Bird Droppings etc.

Hook and Loop Closure：Extra 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 Design：Two 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 Tips：The 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.

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

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

Large Enough Size: you will receive 1 piece of hot tub bubble cover, each measures approx. 6 x 6 ft/ 183 x 183 cm, large enough to meet your needs and replacements, and you can cut it into desired sizes and shapes according to your demands

Reliable and Long Lasting: the pool solar blanket is made of PE material, reliable and reusable, sturdy and lightweight, not easy to break or fade, which can serve you for a long time, and you can use it with confidence

Simple to Use: inflatable hot tub cover is easy and convenient for you to use, you just need to put it over your hot tub or swimming pool to help retain heat, which can reduce evaporation and keep your water clean, bringing much convenience to you

Heat Retention: hot tub blanket can use the power of the sunlight to heat up the water, and the bubble can provide nice heat insulating, keeping your water warm and make you enjoy swimming

Widely Applicable: solar blanket for inground pools is a practical and useful accessory for swimming pool, hot tub, spa, pond and so on, which can not only trap heat from the sun during the day and reduce water evaporation, but also can keep your swimming pool away from debris and leaves when not in use

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

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

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 ft/210 cm diameter and fits most round circle 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

Floating thermal spa blanket

Closed cell foam hot tub blanket

Insulating spa blanket

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 6 ft/180 cm diameter and fits most round circle 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