21 ft x 23 ft x 31.1 ft Brown Right Triangle Sun Shade Sail - Durable

In this review the focus is a large triangular shade sail designed for outdoor spaces that need reliable sun protection. The 21' x 23' x 31.1' brown right triangle sun shade sail is aimed at homeowners and small businesses who want broad, cooling coverage with a tidy appearance; the single biggest reason to buy is its combination of strong virgin polyethylene fabric and a curved edge design that prevents sagging so the sail stays taut and effective over a season. It reads like a practical upgrade for patios, poolsides, driveways and carports.

Key Features

• Corner-to-corner measurement: Sizes are specified from corner to corner so you can plan anchor points and expected coverage precisely.
• Curved edge design: Edges are made slightly curved with a calculated radian to prevent sagging and keep the sail looking neat and functioning well.
• Virgin polyethylene fabric: Lightweight yet high tensile strength material gives durable performance while remaining easy to handle during installation.
• High UV blockage: Provides up to 95% UV blockage and about 90% visibility reduction, improving cooling and sun protection for outdoor spaces.
• All-season utility: Offers shading and cooling in summer, ventilation, some frost protection at night, and slight rain resistance during wet weather.
• Custom ordering and warranty: Available to be customized to fit nonstandard layouts and backed by a 3-year limited warranty for added confidence.

Who It's For

The shade sail is best for homeowners with patios, pools, balconies, driveways or carports who want a durable, high-coverage shade solution that reduces heat and sun exposure. It also suits gardeners and small businesses needing inexpensive but sturdy sun protection that can be adjusted for different mounting points.

Those who should look elsewhere include buyers who need full waterproofing in heavy rain or professional-grade tension systems included; this product is slightly rainproof but not intended as a replacement for a hard canopy or a fully sealed awning. Also consider alternatives if you require specialized hardware or complex mounting included out of the box.

Pros & Cons

Pros

• High UV and visibility blockage keeps pools and patios noticeably cooler and shaded.
• Curved edges reduce mid-span sag so the sail maintains a clean, taut appearance.
• Lightweight virgin polyethylene is strong yet easy to handle during installation.
• Custom orders and a 3-year limited warranty give flexibility and reassurance.

Cons

• Hardware is included but receives mixed feedback, so some buyers may prefer to purchase premium fittings separately.
• Only slightly rainproof, so it is not ideal where full water protection is required.

Specifications

Shape	Right triangle
Dimensions (corner to corner)	21' x 23' x 31.1'
Color	Brown
Material	Virgin polyethylene
UV blockage	Up to 95%
Visibility reduction	About 90%
Warranty	3-Year Limited Warranty

Our Verdict

This 21' x 23' x 31.1' right triangle shade sail is a strong value for anyone wanting expansive sun protection with a tidy, sag-resistant shape. Its durable virgin polyethylene fabric, high UV blockage and custom order option make it a sensible choice for patios, pools and driveways, though buyers who need full waterproofing or premium mounting hardware may need to budget extra for fittings.

Frequently Asked Questions

How are sizes measured?
The measurement is taken from corner to corner, which helps plan anchor placement and expected coverage accurately.

Is this shade sail waterproof?
It is slightly rainproof but not fully waterproof; it is designed primarily for sun protection, cooling and light weather resistance.

Does it come with hardware?
Hardware is included but customer feedback is mixed, so some buyers choose to upgrade fittings for heavy-duty tensioning.