13ft x 17ft x 21.4ft Right Triangle Sun Shade Sail - UPF50

In this review the reviewer looks at the 13' x 17' x 21.4' right triangle sun shade sail to see who benefits most from a custom-size canopy. The bottom line: this shade sail is for homeowners or small commercial spaces that need a tailored, heavy-duty solution that blocks sun while remaining breathable. The single biggest reason to buy is the combination of 95% UV protection and a customizable, D-ring measured fit that can cover awkward or asymmetrical outdoor areas better than standard off-the-shelf covers.

Key Features

• 95% UV protection: The 200 GSM HDPE fabric blocks up to 95% of harmful UV rays so the shaded area is significantly safer for long daytime use.
• Temperature reduction: The sail reduces ambient temperature by as much as 15 degrees compared to unshaded areas, making patios and play areas noticeably cooler.
• Custom fit: Measurements are taken D-ring to D-ring so the canopy can be made to match unusual dimensions and mounting points for a cleaner installation.
• Durable construction: Stainless steel D-rings, reinforced edges and double-layer stitching improve longevity under tension and resist fraying at the corners.
• Air and water permeable: The fabric sheds some moisture and allows airflow, reducing wind load and pooling while keeping the space ventilated.
• Flexible installation: The sail can be mounted to trees, walls, roofs or poles and works with common hardware kits for varied site conditions.

Who It's For

This shade sail suits homeowners with patios, decks or pools where a custom triangular layout makes better use of space than rectangular sails or umbrellas. It is also a good match for small commercial areas such as cafe patios or market stalls that need dependable UV protection with a tailored fit.

Those who should look elsewhere include buyers who want a fully waterproof canopy for heavy rain or people who expect a maintenance-free product in extremely harsh sun without replacement; some users report variable longevity under intense exposure and periodic replacement may be required.

Pros & Cons

Pros

• High sun protection from the 200 GSM HDPE fabric that blocks up to 95% of UV rays.
• Custom sizing from D-ring to D-ring creates a neat fit for awkward shapes and mounting points.
• Strong construction with stainless steel D-rings and reinforced, double-stitched edges.
• Reduces temperature under the sail, improving comfort during hot days.

Cons

• Durability reports are mixed; long-term life can vary with sun exposure and some users replaced the sail after a year or so.
• Not fully waterproof, so it will not replace a hard canopy during heavy rain.

Specifications

Product type	Right triangle shade sail
Size	13' x 17' x 21.4'
Material	200 GSM HDPE
UV blockage	Up to 95% (UPF50+)
Mounting	D-rings with reinforced edges
Permeability	Water and air permeable
Assurance	3 years

Our Verdict

The 13' x 17' x 21.4' right triangle shade sail is a practical, value-oriented option for anyone needing strong UV protection and a customizable fit for irregular outdoor spaces. With robust hardware and a heavy 200 GSM weave it balances breathability and sun blocking well, though buyers should plan for eventual replacement under very intense sun exposure. Overall, it is a solid choice when tailored coverage and cooling are the priority.

Frequently Asked Questions

Is this sail waterproof?
Answer. The fabric is water and air permeable, so it repels some moisture but is not fully waterproof for heavy, sustained rain.

How should I measure for a custom fit?
Answer. Measure from D-ring to D-ring at the fixed mounting points so the manufacturer can make the sail to those exact dimensions.

How durable is the construction?
Answer. The sail uses stainless steel D-rings, reinforced edges and double-layer stitching with a 3-year assurance, but actual lifespan varies by sun exposure and local conditions.