ShadeMart 11ft x 20ft Brown Sun Shade Sail UPF50 Rectangle - Durable

In this review the ShadeMart 11' x 20' brown rectangle shade sail is examined for backyard and carport use; its main appeal is reliable sun protection without trapping heat. The reviewer finds the woven HDPE fabric and stainless steel corner D rings deliver a sturdy, low-maintenance canopy that blocks a high percentage of UV while remaining breathable. For anyone who wants a large, decorative shade that lowers temperature under it and can be attached to posts, walls or trees, this sail is a practical choice that balances durability and airflow.

Key Features

• Material: Woven HDPE fabric provides a tough, tear-resistant membrane that resists degradation from sun exposure.
• UV Protection: The UPF50 design blocks up to 95% of harmful UV rays, reducing direct sun and helping lower temperatures beneath the canopy.
• Breathability: Water permeable and breathable construction lets water and air pass through, preventing puddling and keeping the shaded area cooler.
• Hardware: Stainless steel corner D rings attached to heavy duty white webbing make for strong, corrosion-resistant anchor points for a secure installation.
• Custom Size Options: Multiple custom sizes are available so customers can match the sail to patios, carports, pergolas, or pool areas when measured accurately.
• Styling: Rectangle shape and neutral brown color work as both functional shade and a decorative addition to many outdoor designs.

Who It's For

This shade sail suits homeowners and renters who need a large, durable canopy for patios, carports, pergolas, or poolside areas and who prefer a breathable fabric that lowers heat rather than trapping it. It is a good fit for people mounting shade to poles, walls, trees or roofs using separate hardware kits and who want a product that endures sun and weather exposure.

It is not ideal for buyers who require a fully waterproof cover or expect factory-perfect rectangular dimensions without any manual measurement variance, so those needing rigid waterproof canopies or precise prefab panels should consider other solutions.

Pros & Cons

Pros

• High UPF protection and visible cooling effect under the sail, improving comfort on hot days.
• Durable woven HDPE resists sun damage and the stainless steel D rings provide reliable attachment points.
• Breathable, water permeable fabric prevents pooling and improves airflow compared with solid tarps.
• Custom size availability lets users tailor coverage to nonstandard spaces.

Cons

• Not waterproof, so it will not keep heavy rain completely out from beneath the sail.
• Size and shape may show slight variations from manual measurements, so careful measuring is required.

Specifications

Product type	Rectangle shade sail canopy
Size	11' x 20'
Material	Woven HDPE (high density polyethylene)
UV protection	UPF50, blocks up to 95% of UV rays
Corners	Stainless steel D rings on heavy duty white webbing
Weather	Water permeable and breathable (not waterproof)
Use cases	Patio, carport, pergola, pool, yard, window shade

Our Verdict

The ShadeMart 11' x 20' brown rectangle sail is a practical, value-oriented option for anyone who needs large-area sun protection that cools the space without trapping heat. Its robust HDPE fabric and stainless steel corners make it durable and straightforward to install with a proper hardware kit, while the water-permeable design prevents pooling. Choose this if you want affordable, effective UV protection and decorative coverage; look elsewhere if you need a waterproof canopy or laser-precise factory dimensions.

Frequently Asked Questions

Is this shade sail waterproof?
Answer: No, the fabric is water permeable and breathable so it will allow water to pass through rather than provide a waterproof cover.

Can I mount it to trees or poles?
Answer: Yes, with the proper hardware kits the stainless steel D rings and webbing allow attachment to poles, trees, walls or roofs.

Will it reduce temperature under the sail?
Answer: Yes, the sail blocks a high percentage of UV and sunlight and typically lowers perceived temperature under the canopy by several degrees.