Custom Size 11ft x 21ft x 23.7ft Black Right Triangle Shade Sail

In this review the Custom Size 11' x 21' x 23.7' black right triangle shade sail is judged as a practical choice for homeowners and small businesses who need high sun protection in a tailored fit. The single biggest reason to buy is its combination of 95% UV blockage and custom sizing, which lets the sail cover awkward areas that standard shades cannot. Installation is straightforward for anyone comfortable with basic mounting hardware, and the material and reinforcement aim to deliver a long-lasting outdoor canopy solution.

Key Features

• 95% UV protection: The 200 GSM HDPE fabric blocks up to 95% of harmful rays so shaded areas stay safer and more comfortable.
• Temperature reduction: Tested users report the sail drops local temperatures by as much as 15 degrees compared with unshaded spots, improving outdoor comfort.
• Customizable fit: Measured D-ring to D-ring sizing lets buyers order an exact right triangle canopy to fit irregular patios or yard corners.
• Durable construction: Reinforced edges, double-layer stitching and stainless steel D-rings are intended to resist wear and hold tension without fraying.
• Flexible installation: Can be mounted to trees, roofs, walls or poles using standard hardware kits and with guidance on corner spacing for best performance.

Who It's For

This shade sail is best for homeowners, cafes, and offices with outdoor seating or play areas that need a tailored shade solution and strong UV protection. The custom sizing and right triangle shape suit patios, decks, or spaces where rectangular sails would leave gaps.

It is not ideal for buyers who need a fully waterproof awning or those unwilling to check and adjust anchor points seasonally; the fabric is water and air permeable, so heavy rain will pass through rather than shed like a solid canopy.

Pros & Cons

Pros

• High sun protection with up to 95% UV blockage for safer outdoor use.
• Custom D-ring to D-ring sizing provides a precise fit for awkward layouts.
• Sturdy build with stainless steel D-rings and reinforced double-stitched edges.
• Noticeable cooling effect, reducing local temperatures compared to unshaded areas.

Cons

• Durability reports are mixed over long exposures; some users saw faster wear in very harsh sun.
• Permeable fabric is not fully waterproof, so it will not keep heavy rain from coming through.

Specifications

Product shape	Right triangle
Size	11' x 21' x 23.7'
Material	200 GSM HDPE fabric
UV protection	Up to 95% blockage (UPF50+)
Water behavior	Water and air permeable
Hardware	Stainless steel D-rings, reinforced edges
Warranty	3 years assurance

Our Verdict

The custom right triangle shade sail is a sensible value for anyone needing strong sun protection and a tailored fit. Its 95% UV blockage, reinforced construction and cooling effect make it worthwhile for patios, cafes, and play areas, though buyers should accept that the permeable fabric is not a full waterproof solution and that long-term durability can vary with exposure.

Frequently Asked Questions

Is this sail waterproof?
Answer. No; the fabric is water and air permeable so it allows rain to pass through rather than shed water like a waterproof awning.

How should I measure for a custom fit?
Answer. Measure from D-ring to D-ring at each corner for the exact dimensions and allow recommended corner gap spacing as advised by the manufacturer.

How durable is the fabric in strong sun?
Answer. The 200 GSM HDPE with reinforced stitching and stainless D-rings is built for longevity, but some users report mixed long-term durability in very harsh sunlight conditions.