Custom Size 11ft x 21ft x 23.7ft Gray Right Triangle Sun Shade Sail

In this review the focus is on a custom-size right triangle shade sail designed for homeowners and small businesses who need reliable sun protection for irregular outdoor spaces. The bottom line: this sail is best for anyone who values 95% sun protection and a tailored fit, because it combines heavy 200 GSM HDPE fabric and reinforced hardware to block most UV while still allowing air and water permeability. Installation takes some planning, but the result is a cooler, shaded area that can reduce temperature by up to 15 degrees versus unshaded spots.

Key Features

• 95% UV blockage: The woven 200 GSM HDPE fabric blocks up to 95% of harmful rays for safer outdoor time.
• Temperature reduction: Designed to lower ambient temperature by as much as 15 degrees in shaded areas, making patios and play spaces more comfortable.
• Custom sizing: Measured D-ring to D-ring to ensure a tailored fit for awkward or specific spaces, with options to request straight edges.
• Durable construction: Stainless steel D-rings, double-layer stitching and reinforced edges add strength and resist fraying under regular use.
• Breathable and water permeable: The fabric sheds some water and allows airflow, reducing pooling and wind loading compared with solid canopies.
• Easy mounting guidance: Can be attached to trees, roofs, walls or posts with recommended corner gaps and standard mounting kits for flexible placement.

Who It's For

This shade sail is well suited to homeowners, daycare yards, cafes, or small commercial patios that need a non-permanent, high-coverage shade solution where a triangular panel fits better than a rectangular one. People who want to customize dimensions to fit awkward corners or specific mounting points will appreciate the made-to-order approach and D-ring measurement method.

It is less suited to buyers seeking a fully waterproof awning or a rigid structure; because the fabric is air and water permeable it will not function like a tarp in heavy, driving rain. Also, if a buyer expects maintenance-free decades of outdoor exposure, note that long-term durability can vary with sun and weather conditions.

Pros & Cons

Pros

• Excellent sun protection thanks to the 200 GSM HDPE weave that blocks about 95% of UV.
• Noticeable cooling effect, with reported temperature reductions up to 15 degrees under the sail.
• Robust hardware and reinforced seams make for a stronger, more secure installation.
• Custom sizing allows a precise fit for irregular spaces and mounting points.

Cons

• Durability reports are mixed; some users see good multi-year life while others experienced faster degradation in harsh sun.
• Not fully waterproof, so heavy rain or wind-driven water will pass through the fabric.

Specifications

Shape	Right triangle
Size (D-ring to D-ring)	11' x 21' x 23.7'
Material	200 GSM HDPE fabric
UV blockage	Up to 95%
Hardware	Stainless steel D-rings, reinforced edges
Permeability	Water and air permeable
Warranty	3-year assurance included

Our Verdict

For anyone needing a tailored shade solution that prioritizes sun protection and cooler outdoor spaces, this custom right triangle sail offers strong value thanks to its heavy 200 GSM fabric, reinforced hardware and the ability to order precise dimensions. Buyers should plan for correct corner spacing and accept that it is breathable rather than fully waterproof; with proper installation it is a cost-effective way to add shade to awkward areas.

Frequently Asked Questions

Is this shade sail waterproof?
The fabric is water and air permeable, so it sheds some water but is not fully waterproof like a solid tarp.

How are custom sizes measured?
Sizes are taken D-ring to D-ring for an accurate fit; communicate exact mounting points when ordering to get the intended coverage.

How long will it last outdoors?
Durability varies with sun exposure and climate; reinforced stitching and stainless hardware improve lifespan, but some users report shorter life in harsh UV conditions while others see over a year or more of service.