Hot Tub Bubble Blanket 7 x 7 ft 16-Mil Solar Cover - Heat Retaining

Our review of the Hot Tub Bubble Blanket finds it best for hot tub and small pool owners who want a simple, low-cost way to retain heat and cut evaporation. The cover is a 7 x 7 ft square solar blanket made from PE material and 16-mil thickness, and the single biggest reason to buy is the combination of effective heat retention and easy customization: it can be trimmed to fit odd-shaped tubs and keeps water warmer while reducing water loss.

Key Features

• Energy saving: Uses sunlight to warm water and reduces evaporation by up to 95%, which helps lower heating needs and conserve water.
• Durable material: Constructed from lightweight PE that resists fading and damage from sun and water for repeated seasonal use.
• 16-mil thickness: A heavier gauge than thin covers, providing better insulation and longer contact with the water surface for improved thermal performance.
• Customizable size: The 7 x 7 ft square can be cut to shape, making it suitable for round, rectangular, and irregular hot tubs and small pools.
• Wide application: Works for hot tubs, spas, ponds and small above-ground pools to reduce debris and help maintain water clarity when not in use.

Who It's For

This cover is ideal for owners of small hot tubs, portable spas and metal-frame above-ground pools who want an affordable way to keep water warm between uses and cut down on evaporation. It suits DIYers who need a trim-to-fit solution rather than a bespoke factory-cut cover.

It is less suited to very large in-ground pools or situations where a fitted, reinforced safety cover is required. Users seeking a multi-year commercial-grade warranty or heavy-duty vinyl may want to consider thicker or professionally fitted alternatives.

Pros & Cons

Pros

• Good heat retention for preheating and keeping water warm after use.
• Easy to cut and adapt to different tub shapes and sizes.
• Lightweight PE construction resists fading and handles seasonal exposure.
• Helps reduce evaporation and keeps water clearer between swims.

Cons

• Durability is mixed in customer reports; some users saw wear after several months while others had longer life.
• Not a substitute for a reinforced safety cover on large or public pools.

Specifications

Product type	Solar bubble blanket / pool spa cover
Size	7 x 7 ft (square)
Material	PE (polyethylene)
Thickness	16-mil
Primary benefit	Solar heating and evaporation reduction
Applications	Hot tubs, spas, small pools, ponds

Our Verdict

The Hot Tub Bubble Blanket is a practical, budget-friendly option for hot tub and small pool owners who want to retain heat and limit evaporation without a custom cover. Its cut-to-fit flexibility and 16-mil PE construction make it good value for seasonal use, though those needing long-term heavy-duty performance should weigh mixed durability reports.

Frequently Asked Questions

Can I trim this cover to fit my tub?
Yes. The square blanket can be cut to the desired size and shape to fit round, oval or irregular hot tubs.

Will it reduce evaporation?
Yes. The design and material are intended to cut water evaporation substantially, helping to retain water and heat between uses.

Is this a safety cover?
No. This is a solar thermal blanket and is not a reinforced safety cover; it is meant for heat retention and debris reduction, not load-bearing safety.