12 ft x 17 ft x 20.8 ft Right Triangle Sun Shade Sail - Durable UV

In this review of the 12 ft x 17 ft x 20.8 ft Right Triangle Sun Shade Sail, the bottom line is clear: this is a practical, heavy-duty sun canopy for homeowners who want reliable sun protection across a large outdoor area. Built from virgin polyethylene with high tensile strength, it delivers up to 95% UV blockage and is designed with slightly curved edges to prevent sagging, which is the single biggest reason to consider it if appearance and consistent shade are priorities.

Key Features

• Corner-to-corner measurement: Exact sizing measured from corner to corner gives predictable coverage so you can plan mounting points accurately.
• Curved edge design: Edges are cut with a precisely calculated radian to prevent sagging in the middle, maintaining a taut, finished look over time.
• Durable material: Made from virgin polyethylene for strong tensile strength and light weight, balancing durability with easier handling at install.
• High UV protection: Blocks up to 95% of UV and about 90% of visibility, making it effective for cooling pools, patios, and carports.
• Versatile weather performance: Provides summer shading and ventilation, helps reduce night frost risk, and is slightly rainproof during light rain.
• Customizable and warranted: Available for custom orders and backed by a 3-Year Limited Warranty for additional assurance.

Who It's For

This shade sail is aimed at homeowners and small commercial users who need broad, effective sun coverage for outdoor spaces such as backyards, swimming pools, patios, carports, or driveways. It is especially useful when aesthetics matter: the curved edges help the sail look neat and prevents the billowy sag common with cheaper sails.

Those who should look elsewhere include buyers who need full waterproofing in heavy rain, or who require a rigid, permanent roof structure; this sail is slightly rainproof but is intended primarily for sun and light-weather protection. Also consider a different shape or custom sizing if the triangle dimensions do not match your mounting points.

Pros & Cons

Pros

• High UV blockage and good visibility reduction make it effective for cooling and sun protection.
• Curved edge cutting and corner measurements reduce sag and improve long-term appearance.
• Lightweight yet strong virgin polyethylene fabric balances handling with durability.
• 3-Year Limited Warranty and custom order options add value and flexibility.

Cons

• Hardware included draws mixed feedback, so expect to supplement or choose mounting gear carefully.
• Only slightly rainproof, so it is not a substitute for a waterproof roof in heavy weather.

Specifications

Shape	Right triangle
Size	12 ft x 17 ft x 20.8 ft (measured corner to corner)
Material	Virgin polyethylene
UV blockage	Up to 95%
Visibility reduction	About 90%
Weather resistance	Shading, cooling, ventilation; slightly rainproof
Warranty	3-Year Limited Warranty

Our Verdict

The 12 ft x 17 ft x 20.8 ft Right Triangle Sun Shade Sail is a solid choice for anyone who needs effective sun protection with a clean, taut appearance. Its strong polyethylene fabric, curved-edge design to prevent sagging, and high UV blockage deliver good value for patios, pools, and carports, though buyers should plan mounting hardware and not expect full waterproofing in heavy rain.

Frequently Asked Questions

How is the size measured?
Measurements are taken from corner to corner, which helps predict how much coverage you will get once mounted.

Is the fabric waterproof?
The material is slightly rainproof for light showers but is not fully waterproof for sustained heavy rain.

Can I get a custom size?
Yes, the product is available for custom orders to better match specific mounting layouts.