20 ft x 21 ft x 29 ft Red Right Triangle Sun Shade Sail - Durable UV

In this review of the 20' x 21' x 29' Red Right Triangle Sun Shade Sail, the bottom line is simple: this canopy is best for homeowners who need a large, durable shade solution that blocks intense sun while staying lightweight and ventilated. The reviewer found the sail's measured corner-to-corner sizing and slightly curved edges deliver a neat, tensioned installation that resists sagging and provides excellent cooling for pools, patios, and driveways. For anyone wanting heavy waterproofing or a rigid structure, a different product may be more appropriate.

Key Features

• Corner-to-corner measurement: Precise sizing taken from corner to corner ensures the expected coverage and helps align the sail with existing anchor points.
• Curved edge design: Slightly curved edges are cut with a calculated radian to prevent sagging in the middle and keep a clean, taut appearance over time.
• Virgin polyethylene fabric: The lightweight material offers strong tensile strength so the sail holds shape without adding unnecessary load to mounting hardware.
• High UV and visibility blockage: Provides up to 95% UV blockage and roughly 90% visibility reduction to keep shaded areas cooler and protected from sun exposure.
• Seasonal versatility: The fabric promotes ventilation for summer cooling, offers anti-frost protection at night and is slightly rainproof during wet weather.
• Customizable and warranted: The product can be customized to fit irregular spaces and ships with a 3-Year Limited Warranty for added peace of mind.

Who It's For

This shade sail is ideal for homeowners with outdoor living spaces such as backyards, patios, pools, carports and driveways who want a large right-triangle canopy that balances sun protection with airflow. It is well suited to placements among trees or between posts where lightweight, tensile fabric and a curved-edge cut will produce a tidy, tensioned look.

People who need a completely waterproof or rigid roof replacement, or who require permanent metal framing, should look elsewhere. Also consider a different product if precise on-site measuring and secure anchor hardware are not possible for your intended placement.

Pros & Cons

Pros

• Blocks up to 95% of UV and greatly reduces visibility from above, improving pool and patio comfort.
• Curved edge design prevents middle sagging, keeping a neat, taut installation when tensioned correctly.
• Lightweight virgin polyethylene delivers good durability and tensile strength without heavy mounting needs.
• Customers report strong color and value for money, with easy installation in many setups.

Cons

• Hardware included received mixed feedback, so buyers may want to upgrade anchors or fasteners for long-term installations.
• Only slightly rainproof; it is not a substitute for a fully waterproof awning in heavy storms.

Specifications

Shape	Right triangle
Measured size	20' x 21' x 29' (corner to corner)
Material	Virgin polyethylene
UV blockage	Up to 95%
Visibility blockage	Approx. 90%
Warranty	3-Year Limited Warranty
Customization	Available on request

Our Verdict

The 20' x 21' x 29' red right triangle sun shade sail is a solid value for homeowners needing broad UV protection and good airflow for patios, pools, and carports. Its corner-to-corner measurement and curved edges produce a tidy, tensioned install, and the durable polyethylene fabric balances strength with light weight. Buy it if you want effective sun blocking and ventilation; consider upgraded hardware for long-term mounting.

Frequently Asked Questions

Is the sail waterproof?
The fabric is slightly rainproof but not fully waterproof; it sheds light rain but is not a replacement for a sealed awning.

Does the product come with hardware?
Basic hardware is included, but customer feedback is mixed so stronger anchors or upgraded fasteners may be needed for permanent setups.

Can I get a custom size?
Yes, all products from this line are available to be customized to fit specific measurements and layouts.