12 ft x 20 ft Green Right Triangle Sun Shade Sail - Durable UV Block

In this review the 12 ft x 20 ft x 23.3 ft green right triangle sun shade sail is evaluated for homeowners and outdoor space keepers who need broad, reliable sun protection. The bottom line: this sail is best for those who want a lightweight, high-strength fabric that blocks up to 95% of UV while keeping outdoor areas cooler; our review finds the sail especially useful over pools, patios, and driveways because the curved edge design prevents mid-span sag and preserves a tidy, tensioned appearance.

Key Features

• Corner-to-corner measurement: The stated size is measured from corner to corner so buyers can plan attachment points accurately for a clean, tensioned install.
• Curved edge design: Edges are slightly curved using a calculated radian to prevent sagging in the middle, which improves both appearance and long-term performance.
• Virgin polyethylene fabric: The lightweight but high tensile-strength material makes the sail durable while remaining easy to handle during installation.
• High UV blockage: The fabric provides up to 95% UV blockage and about 90% visibility reduction, delivering effective sun and glare protection for outdoor living spaces.
• All-season benefits: The sail helps with shading and cooling in summer, offers some anti-frost benefit at night, and is slightly rainproof in lighter rain.
• Custom orders and warranty: The product can be customized to fit specific layouts and includes a 3-Year Limited Warranty for added assurance.

Who It's For

This shade sail is ideal for homeowners with a pool, patio, garden, carport, or balcony who need a large, shaped cover that holds tension and blocks strong sunlight. It suits DIY installers who want a lighter material that is still high strength and who appreciate the pre-calculated curved edges to reduce mid-span sag.

People who should look elsewhere include those needing fully waterproof canopies for heavy rain or those requiring a rigid, permanent structure; for heavy storm exposure or full waterproofing a hardtop or dedicated awning would be more appropriate.

Pros & Cons

Pros

• Effective sun protection with up to 95% UV blockage, keeping outdoor areas noticeably cooler.
• Curved edge construction prevents sagging for a neater, longer-lasting tensioned look.
• Made from virgin polyethylene for a balance of light weight and strong tensile strength, making installation manageable.
• Customizable sizing and a 3-Year Limited Warranty add flexibility and peace of mind.

Cons

• Only slightly rainproof, so it is not suitable as primary protection in heavy or prolonged rain.
• Hardware included receives mixed feedback, so buyers may prefer to select higher-grade fittings for windy locations.

Specifications

Shape	Right triangle
Measured size	12 ft x 20 ft x 23.3 ft (corner to corner)
Color	Green
Material	Virgin polyethylene fabric
UV protection	Up to 95% UV blockage
Visibility reduction	About 90%
Warranty	3-Year Limited Warranty

Our Verdict

The 12 ft x 20 ft right triangle shade sail is a practical value purchase for backyard, poolside, and patio shading where UV protection and a tensioned, low-sag appearance matter. Its lightweight virgin polyethylene and curved-edge construction deliver durability and neat installation, while custom options and the 3-Year Limited Warranty make it a sensible choice for most residential outdoor shading needs.

Frequently Asked Questions

Is this sail waterproof?
The fabric is only slightly rainproof and is not intended as a fully waterproof canopy for heavy rain.

How is the size measured?
Measurements are taken from corner to corner, so plan mounting points accordingly to achieve correct tension.

Can I order a custom size?
Yes, all products from this line are available to be customized to fit nonstandard layouts.