MADHOLLY 7ft Round 16MIL Heavy-Duty Spa Solar Cover — Trim-to-Fit, Superior Heat Retention

MADHOLLY’s 7ft round 16MIL heavy-duty spa cover is a trim-to-fit solar blanket that reduces evaporation, accelerates heating, and preserves hot tub water temperature.

This thick, bubble-style spa cover is made for round inflatable and small rigid hot tubs that need stronger insulation than typical 8–12 mil blankets. The 16 mil construction resists tearing and bubble loss so the cover lasts longer while helping you cut heating time, lower energy use, and reduce water top-offs. It ships folded, so simple flattening makes it ready for trimming and use.

How does this cover speed up heating and save energy?

The thick 16 mil bubbles trap solar and heated energy at the water surface, reducing heat loss overnight and between sessions. By holding warmth and reflecting heat back into the tub, less run-time is needed from your heater, which can lower energy consumption and expense.

• 16 mil material for better thermal retention than thinner blankets
• Bubble side placed down so air pockets sit against water for insulation
• Reduces heater run-time and helps maintain usable temperature

Will this cover fit my round inflatable hot tub?

The blanket measures 7ft in diameter and is designed for most round inflatable and similarly shaped spa tubs. If your tub has irregular features, the cover is easy to trim: place it over the tub, mark the adjustments, and cut along the line to create a custom fit.

• 7ft diameter fits many standard round tubs
• Trim-to-fit design for irregular rims or accessories
• Instructions: flatten, position, mark, then carefully cut to size

How should I install and care for the solar blanket?

Lay the cover bubble-side down with the smooth side up so the bubbles contact the water and trap heat. To remove creases from folding, lay the blanket flat in the sun or weight it down for a few hours; rinse and air-dry before storage to prevent buildup and extend life.

• Position bubbles toward water, smooth side upward
• Flatten folds by weighing down or sun exposure for a few hours
• Rinse with fresh water and dry before long-term storage

What performance benefits can I expect in day-to-day use?

The solar cover cuts up to 95% of evaporation loss and reduces condensation on the main cover, which helps conserve water and lowers chemical consumption. It also absorbs sunlight to provide passive warming, meaning quicker heat-up times on sunny days and less reliance on the heater.

• Up to 95% reduction in evaporation compared with uncovered tubs
• Less condensation and reduced edge freeze risk in cool conditions
• Durable bubbles resist cracking so insulation lasts longer

Who is this for: The MADHOLLY 7ft 16MIL round spa cover is ideal for owners of round inflatable or small rigid hot tubs who want a durable, low-cost way to cut heating time, conserve water, and protect their tub between uses. It's well suited for budget-conscious homeowners, rental property managers with inflatable spas, and anyone looking for an easy-to-customize thermal blanket to strengthen insulation without replacing factory covers.