ShadeMart 11 ft x 15 ft Black Rectangle Sun Shade Sail - UPF50

In this review the ShadeMart 11 ft x 15 ft Black Rectangle Sun Shade Sail is evaluated for homeowners and small businesses seeking a durable, breathable sun screen that cuts heat without trapping water. The bottom line: this UPF50 rectangle sail is best for patios, carports and poolside areas where solar protection and airflow matter; it is not waterproof but reliably blocks up to 95% of UV, lowers temperatures noticeably and is built from heavy duty woven HDPE with reinforced stainless steel D rings.

Key Features

• Material: Woven HDPE fabric provides a strong, tear-resistant canopy that stands up to regular outdoor use while remaining lightweight.
• UV protection: Rated to block up to 95% of harmful UV rays, the sail lowers surface and ambient temperatures by roughly 10 to 15 degrees in direct sun.
• Breathability: The water permeable, breathable weave allows rain and air to pass through so water does not pond and wind loads are reduced.
• Hardware: Heavy duty white webbing and stainless steel corner D rings create secure attachment points and improve long-term durability.
• Customization: A range of custom sizes is available so you can match irregular venues, with the area of fabric maintained even if linear measurements vary.

Who It's For

Homeowners with a patio, pergola, carport or pool area who want significant UV protection and cooling without the feel of a solid tarp will appreciate this shade sail. Landscapers and small event venues that need a decorative, rectangle-shaped canopy that integrates with existing posts, trees, or walls will find it practical and easy to install with the right hardware kit.

Those who require a fully waterproof cover or an exact factory-cut rectangle for architectural installations should look elsewhere; the fabric is explicitly water permeable and manual measurement tolerances mean dimensions can vary slightly even though fabric area stays constant.

Pros & Cons

Pros

• Strong woven HDPE construction feels durable and has held up in severe weather for some customers.
• Excellent sun protection with UPF50-rated performance that reduces heat and glare.
• Breathable, water permeable design prevents pooling and improves airflow compared with solid canopies.
• Stainless steel D rings and heavy duty webbing make mounting straightforward with common hardware kits.

Cons

• Not waterproof, so it will not keep out heavy rain or serve as a sealed shelter.
• Size and shape may vary slightly due to manual measurement and cutting, so precise architectural fits can be challenging.

Specifications

Our Verdict

The ShadeMart 11 ft x 15 ft rectangle shade sail is a practical value purchase for anyone wanting reliable UV protection, airflow and a durable outdoor canopy that integrates with existing posts or trees. It is not a waterproof shelter, but for patios, carports and poolside shade it offers strong performance and lasting materials at a reasonable cost.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is water permeable and breathable, designed to let water pass through rather than create a waterproof barrier.

Will this block the sun and lower temperature?
Yes. The woven HDPE construction blocks up to 95% of UV rays and typically reduces temperatures by about 10 to 15 degrees in direct sun.

Can it be attached to posts, trees or a roof?
Yes. With the proper hardware kit the stainless steel D rings and heavy duty webbing allow attachment to poles, trees, walls or roofs.