21 ft x 23 ft Turquoise Rectangle Sun Shade Sail - Breathable UV Block

In this review of the 21' x 23' Turquoise Sun Shade Sail the bottom line is simple: it is best for homeowners and small businesses who need a large, breathable canopy that meaningfully cuts heat while remaining durable and easy to install. The reviewer found the woven HDPE fabric blocks up to 95% of harmful UV rays, lowers ambient temperature noticeably, and installs with basic hardware attached to the stainless steel D rings. If you want a decorative, heavy duty rectangle shade for patios, carports, or pools, this sail is a practical, no-frills option.

Key Features

• Woven HDPE fabric: provides a strong, tear-resistant surface that lets air and water pass through so the sail stays breathable and cool.
• Stainless steel D rings: are attached to heavy duty white webbing at each corner to give secure anchor points that resist corrosion outdoors.
• Water permeable design: allows rain and wind to pass through, preventing pooling and reducing strain in bad weather.
• UV protection: blocks up to 95% of sunlight to lower temperatures under the canopy by about 10 to 15 degrees in direct sun.
• Custom size options: available in multiple custom dimensions so buyers can measure their venue and choose a sail that fits specific spaces.

Who It's For

The shade sail is well suited for patio and yard owners who want a large, decorative canopy that improves comfort without creating a waterproof roof. It works for carports, pergolas, tents and pool areas where airflow and UV protection matter, and for people who prefer a fabric that drains rather than sheds water.

This is not for shoppers seeking a fully waterproof cover or a permanent rooftop substitute; those who need complete rain protection or insulated roofing solutions should look for a different product. Also, accurate measuring is important - customers installing over irregular spaces should consider professional measuring or a custom order.

Pros & Cons

Pros

• Provides significant shade and temperature reduction thanks to high UV blocking performance.
• Durable construction with woven HDPE fabric and stainless steel D rings that customers report holds up in wind and hail.
• Breathable, water permeable design prevents pooling and reduces strain during storms.
• Available in custom sizes and multiple colors to fit many outdoor styles.

Cons

• Not waterproof, so it will not keep an area dry in sustained rain.
• Manual measurement variability means customers must measure carefully to ensure a correct fit.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	21' x 23'
Material	Woven HDPE (High Density Polyethylene)
Corner hardware	Stainless steel D rings with heavy duty white webbing
Functionality	Water permeable, breathable, UV resistant (up to 95% block)
Typical temperature reduction	About 10-15 degrees under shade

Our Verdict

The 21' x 23' Turquoise rectangle shade sail is a solid value for anyone needing a large, breathable canopy that reduces heat and protects against UV exposure. Its woven HDPE construction and stainless steel D rings deliver durability and simple installation for patios, carports, and poolside areas, though buyers should not expect waterproof performance. For those wanting effective sun protection and airflow at a reasonable price, it is a good, practical choice.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is water permeable and breathable, so it allows water to pass through rather than providing waterproof coverage.

Can the sail be attached to trees or poles?
Yes. With proper hardware kits the sail can be anchored to poles, trees, walls, roofs and similar structures.

How much UV protection does it provide?
The sail blocks up to 95% of harmful UV rays and sunlight, which helps lower temperatures beneath the canopy.