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

The Spa and Hot Tub Cover, a 7 × 7 ft (210 × 210 cm) 16-mil thermal insulation solar blanket, is a fantastic addition for square hot tub owners seeking to maintain water temperature and reduce maintenance. This bubble cover delivers on heat retention, debris protection, and ease of use while adding a polished look to our spa.Packaging and UnboxingThe blanket arrived in a sturdy cardboard box, well-packaged to prevent tears or damage during shipping. The compact folding made it easy to unpack, and the minimal packaging materials were a nice touch for reducing waste. Basic instructions were included, though the straightforward design meant little guidance was needed.Ease of Customization and SetupCustomizing this cover to fit our hot tub was remarkably simple. The 7 × 7 ft size accommodates most square spas, but its trimmable design allows for precise adjustments. Using household scissors, we cut the blanket to match our spa’s exact dimensions in about 12 minutes. The 16-mil low-density polyethylene (LDPE) material is thick yet flexible, holding its shape without fraying during trimming. To install, we placed the bubble side down (as recommended for maximum heat retention) and let it float on the water’s surface. No tools or anchors were required, making setup quick and hassle-free, even for first-time users.Design and AppearanceThe blanket’s blue bubble-wrap design is both functional and visually appealing. The transparent blue hue allows sunlight to penetrate for solar heating while giving our spa a modern, clean look. The bubbles are robust, contributing to insulation and durability, and the cover’s lightweight yet sturdy build resists blowing away in light winds. Compared to thinner alternatives, this 16-mil cover feels substantial and complements our outdoor aesthetic, blending seamlessly with the spa and surrounding patio.Performance and BenefitsThis solar blanket excels at its core functions. It significantly reduces heat loss, keeping our spa water warm overnight and shortening reheating times, especially in cooler weather. We noticed a marked decrease in energy costs, as the cover traps solar heat and minimizes evaporation—potentially cutting heating expenses by up to 60-70%. It also keeps out leaves, dust, and small debris, reducing cleaning frequency and maintaining water clarity. By preventing condensation buildup on our hard spa lid, the blanket helps prolong its lifespan. The UV- and chemical-resistant material withstands daily exposure to chlorine and sunlight, though we suspect the bubbles may degrade after 12-18 months of heavy use, which is typical for such covers.ProsHighly customizable: Easily trimmed to fit square or irregular hot tubs.Effective insulation: Retains heat, reduces evaporation, and lowers energy costs.Durable and attractive: 16-mil LDPE with a sleek blue design enhances spa aesthetics.Simple setup: No tools needed, floats effortlessly on water.Well-packaged: Arrives undamaged with eco-friendly packaging.ConsNo storage solution: A dedicated bag or strap would simplify storage when not in use.

It’s sturdy and feels like it will last a while. I should’ve taken more time cutting it so there are a few gaps on the sides here and there but it’s proving effective after only one week- usually I have to adjust chemicals and pH each week. After using the cover only one week, this is the first time I have tested and the chemicals and pH were unchanged. It made spa care much quicker and hopefully will save money by decreasing needs for chemicals to adjust every week.

Perfect to keep the heat in.Helps to save energy and to give extra life to my spa cover.

Like the cover but temperature changes as well as direct sun exposure plus pool chemicals substantially effect longevity.

Great for retaining heat

easy to use and works great

We really like the pool cover and it fits perfect with no installation. We just laid it down on top. . Looks great and very durable. Keeps our pool clean and retains the water.

After a year or so, this has held up well, and seems to cut back on our electricity usage. One negative is that I had to cut it to fit our hot tub, but that was not too hard to do. It's also a little awkward to take on and off. Note that you may want to lay it out in the sun for a few days for it to out-gas, so it does not make your water smell like vinyl.