13 ft x 20 ft x 23.9 ft Black Right Triangle Shade Sail - 95% UV Block

Our review of this right triangle shade sail finds it best for homeowners and small businesses who need a tailored, heavy-duty canopy that cuts sun exposure dramatically. The single biggest reason to buy is its combination of 95% sun protection with a commercial-grade 200 GSM HDPE weave, which reliably reduces temperatures and resists fraying over time. Installation requires some planning for corner gaps and anchoring, but once in place the sail delivers consistent shade, good looks, and durable performance.

Key Features

• 95% UV Blockage: The fabric blocks up to 95% of harmful UV rays so outdoor spaces stay safer for longer periods of use.
• 200 GSM HDPE Material: A commercial-standard weave gives the sail strength and resistance to tearing while remaining breathable.
• Temperature Reduction: The sail can lower the felt temperature by up to 15 degrees compared with unshaded areas for a more comfortable outdoor environment.
• Custom Fit: Measured D-ring to D-ring sizing allows a tailored fit and the option to request straight edges for a cleaner look.
• Stainless Steel Hardware: Reinforced edges and stainless steel D-rings with double-layer stitching increase longevity and reduce fraying.
• Flexible Installation: Can be mounted to trees, roofs, walls or poles with recommended corner gaps to optimize tension and performance.

Who It's For

This shade sail suits homeowners, cafes, and backyard entertainers who want a strong, attractive canopy that delivers measurable sun protection and cooler shade. It is especially useful where a custom-sized, triangular shape is needed to fit odd or angled outdoor areas.

Those seeking a permanently rigid awning or a fully waterproof cover should look elsewhere; this sail is water and air permeable and designed primarily for sun blocking and ventilation rather than complete weatherproofing. Buyers should also be prepared to measure D-ring to D-ring precisely for the best fit.

Pros & Cons

Pros

• High sun protection with a 95% UV blockage, making it effective for sun-sensitive spaces.
• Durable 200 GSM HDPE fabric plus reinforced edges and stainless D-rings for long life.
• Noticeable cooling effect, reportedly reducing temperatures up to 15 degrees under shade.
• Customizable sizing and option to request straight edges for a tailored appearance.

Cons

• Not a fully waterproof canopy because the material is water and air permeable.
• Fit can be smaller than expected if D-ring to D-ring measurements are not taken carefully.

Specifications

Shape	Right triangle
Size (D-ring to D-ring)	13 ft x 20 ft x 23.9 ft
Color	Black
Material	200 GSM HDPE
UV Protection	UPF50+, 95% blockage
Hardware	Stainless steel D-rings, reinforced edges
Permeability	Water and air permeable

Our Verdict

This right triangle shade sail is a solid value for anyone wanting a heavy-duty, customizable sun canopy that delivers real UV reduction and cooler outdoor spaces. It is well suited to patios, play areas, and commercial seating where breathability and durability matter, provided buyers measure carefully and accept that it is not intended as a waterproof roof.

Frequently Asked Questions

Will this sail block morning or afternoon sun?
The sail blocks up to 95% of UV rays, so placement and orientation will determine whether it shades morning or afternoon sun effectively.

Can it be left up year-round?
The material is durable and stainless fittings resist corrosion, but because it is permeable and not fully waterproof, removing it during severe storms or prolonged winter weather is recommended.

How should I measure for a proper fit?
Measure from D-ring to D-ring for each side and allow the recommended corner gap of about 0.5 ft, or reduce by 1 to 1.5 ft per side if needed for pole placement.