Custom Size 11ft x 18ft x 21.1ft Brown Right Triangle Sun Shade Sail

In this review the reviewer looks at the custom size 11' x 18' x 21.1' brown right triangle sun shade sail and who will benefit most from it: homeowners and small commercial spaces that need reliable sun protection with a tailored fit. The bottom line is simple - this shade sail delivers strong sun blockage and durability at a price that represents solid value, especially when a specific shape and size are required. The review highlights installation flexibility, material performance in heat and wind, and the option to request straight edges for a neater look.

Key Features

• 95% Sun Protection: The high-density 200 GSM HDPE fabric blocks up to 95% of harmful UV rays for safer outdoor time under the canopy.
• Temperature Reduction: The shade sail reduces ambient temperatures by up to 15 degrees compared to unshaded areas, making patios and work areas noticeably cooler.
• Custom Fit: The sail is made to your D-ring to D-ring measurements so it fits irregular spaces like a corner patio or run precisely instead of using a one-size option.
• Durable Construction: Reinforced edges, double-layer stitching, and stainless steel D-rings improve longevity and resistance to fraying under regular outdoor use.
• Breathable and Water Permeable: The material allows air and some water to pass through, reducing wind load and preventing water pooling during rain.
• Flexible Installation: Can be anchored to trees, walls, roofs or poles and adjusted by leaving a small gap at each corner for optimal tension and shape.

Who It's For

This shade sail is well suited for homeowners, small business owners and hobby farmers who need a custom-shaped canopy for a patio, outdoor seating, play area or animal shelter. It particularly fits people who want strong UV protection and a temperature drop under the shade, and who can measure and plan mounting points precisely.

Those who should look elsewhere include buyers needing a fully waterproof awning, or anyone seeking a large single-piece sail for expansive commercial areas without multiple anchor points. Also, buyers who prefer built-in mounting hardware or a rigid frame may find this cloth-style sail less appropriate.

Pros & Cons

Pros

• High sun blockage and cooler shade thanks to the 200 GSM HDPE fabric.
• Sturdy reinforcement and stainless steel D-rings add real durability for seasonal use.
• Custom sizing ensures a tailored fit for awkward or irregular outdoor spaces.
• Breathable, water permeable design reduces wind stress and prevents pooling.

Cons

• Size must be measured accurately; customers noted the delivered sail can feel much smaller than expected if measurements are off.
• Not fully waterproof, so it will not keep heavy rain completely out beneath the canopy.

Specifications

Product Shape	Right triangle
Size	11' x 18' x 21.1'
Material	200 GSM HDPE
UV Protection	Up to 95% (UPF50+)
Permeability	Water and air permeable
Hardware	Stainless steel D-rings, reinforced edges
Warranty	3 year assurance

Our Verdict

The custom size right triangle sun shade sail is a practical choice for anyone needing targeted UV protection with a tailored fit; it combines reliable 95% sun blockage, durable construction, and temperature reduction at a reasonable value. Buyers who take care with measurements and want a breathable, long-lasting shade will find it a strong option, while those needing full waterproofing or a very large single-span canopy should consider other solutions.

Frequently Asked Questions

Is the sail waterproof?
The fabric is water and air permeable, so it sheds some water but is not fully waterproof.

How should I measure for a custom sail?
Measure from D-ring to D-ring at the planned anchor points and allow a small gap at each corner; the seller uses those exact measurements to make the sail.

Can it withstand wind and heat?
Yes, customers report the HDPE fabric and reinforced stitching hold up well in summer heat and moderate wind when properly tensioned.