Kestnsee Hot Tub Solar Bubble Cover Blanket — 7 Ft, 16 MIL Insulating Bubble Blanket to Reduce Evaporation

Kestnsee Hot Tub Spa Solar Bubble Cover Blanket (7 Ft) is a 16 MIL thermal insulating cover that floats bubble-side down to reduce evaporation and retain heat in small hot tubs.

Keep your 1–4 person hot tub warmer longer and cut down on water loss with this heavy-duty solar blanket. Designed for above- or in-ground portable spas and small pools, the 7 ft round cover uses air-filled bubbles to trap heat at the water surface while blocking debris. Its thicker 16 MIL construction offers greater durability than many thin foil or 8–12 MIL alternatives, and it can be trimmed to match irregular tub shapes.

How does the bubble blanket conserve heat and water?

The bubble layer creates an insulating air barrier across the water surface, slowing heat transfer to the air and reducing evaporation. By floating bubble-side down and smooth-side up, the blanket captures solar warmth and helps keep condensation and surface cooling to a minimum.

• 16 MIL thickness increases thermal resistance compared with thinner covers
• Bubbles trap air to prevent rapid heat loss overnight
• Reduces water evaporation by up to about 95% under normal use
• Smooth exterior sheds dirt and light debris for easier maintenance

What size tubs will the 7 ft cover fit and how do I trim it?

The 7 ft diameter fits most small hot tubs intended for 1–4 people; measure the inner diameter of your tub before ordering. If your spa has non-standard contours, lay the blanket over the tub, mark the excess, and cut along the mark to create a custom fit.

• Designed for small portable hot tubs, inflatable spas, and small plunge pools
• Measure inner water surface diameter for an accurate fit
• Easy to trim with scissors to fit irregular shapes or built-in edges
• Edge trimming avoids gaps that allow heat loss or debris entry

How durable and weather-resistant is the material?

The blanket is constructed from 16 MIL material, thicker than many market options, so the bubble cores resist cracking and detaching. While it’s built for repeated floating use and sun exposure, store it flat or rolled and out of direct sunlight when not in use to extend service life.

• 16 MIL thickness resists wear, punctures, and UV stress better than thinner sheets
• Bubbles are bonded to limit separation during handling
• Recommended to remove and store during harsh weather or when not in use long-term
• Easy to clean with mild soap and rinse to preserve material

How should I place and care for the solar spa blanket?

Place the blanket bubble-side down resting on the water with the smooth side facing up. Clean periodically, dry fully before folding or rolling, and avoid dragging it across rough surfaces to reduce abrasion.

• Lay bubble-side down so bubbles contact water for best insulation
• Rinse and dry before storage to prevent mold or chemical damage
• Roll or fold loosely; keep away from sharp objects and heavy tools
• Contact Kestnsee support for fit or material questions after delivery

Who is this for: The Kestnsee 7 ft solar bubble blanket suits owners of small hot tubs and plunge pools who want an affordable, reusable way to keep water temperature steadier, reduce reheating time, and limit top-up frequency. It’s a practical choice for people with inflatable or portable spas, weekend spa users, and anyone looking to cut energy and water waste without complex equipment.