Custom Size 12ft x 17ft x 20.8ft Right Triangle Sun Shade Sail - UPF50

In this review of the custom size 12' x 17' x 20.8' right triangle sun shade sail, the bottom line is simple: this piece is for anyone who needs reliable, heavy-duty UV protection in a tailored size. The reviewer found the sail best suited for patios, garden enclosures, or animal pens where shade, durability, and a measured fit matter most. The single biggest reason to buy is its 95% sun protection combined with a customizable D-ring-to-D-ring sizing method that delivers a near-perfect fit when measured carefully.

Key Features

• 95% UV blockage: The 200 GSM HDPE fabric blocks up to 95% of harmful rays, making it effective for long hours of outdoor use.
• Temperature reduction: The shade sail can lower ambient temperature by up to 15 degrees compared with unshaded areas, improving comfort under the canopy.
• Custom sizing: The product is made to order using D-ring-to-D-ring measurements so the sail can fit unusual or specific spaces.
• Durable construction: Stainless steel D-rings, reinforced edges and double-layer stitching give the sail good resistance to fraying and extended use.
• Permeable design: The woven HDPE fabric is water and air permeable, reducing wind load and preventing water pooling during light rain.
• Three-year assurance: The manufacturer includes a three-year assurance that backs the structural quality of the sail.

Who It's For

This shade sail is ideal for homeowners, hobby farmers, and commercial outdoor spaces that need a tailored cover rather than an off-the-shelf square. It works well when anchored to trees, roofs, walls or posts and suits people comfortable taking precise D-ring-to-D-ring measurements for a good fit.

Those who should look elsewhere include buyers seeking fully waterproof tarps or rigid canopies for heavy storms, and those wanting a standard-sized, inexpensive shade without custom measurements - off-the-rack sails may be faster and cheaper for simple applications.

Pros & Cons

Pros

• High sun protection and measurable cooling thanks to the 200 GSM HDPE fabric and 95% UV protection.
• Well-constructed with stainless D-rings, reinforced edges and double stitching for long-term durability.
• Custom sizes ensure a tailored fit for odd-shaped areas or specific mounting points.
• Permeable fabric reduces wind strain and prevents water pooling compared with solid covers.

Cons

• Some buyers may find the installed sail visually smaller than expected if measurements are not taken precisely.
• Not intended as a fully waterproof solution in heavy rain or for long-term storm protection.

Specifications

Shape	Right triangle
Finished Size	12' x 17' x 20.8'
Material	200 GSM HDPE (water and air permeable)
UV Protection	Up to 95% (UPF50+)
Hardware	Stainless steel D-rings, reinforced edges
Installation	Mount to trees, roofs, walls or poles; measure D-ring to D-ring
Assurance	3 years

Our Verdict

The custom right triangle shade sail is a practical choice for anyone needing strong sun protection and a tailored fit. With durable construction, effective heat reduction and permeability that handles wind better than solid covers, it represents good value for patios, yards and animal shelters when sized carefully.

Frequently Asked Questions

How should I measure for a custom sail?
Measure from D-ring to D-ring along each intended attachment side and provide those finished dimensions so the sail matches your mounting points.

Is the sail waterproof?
The woven HDPE fabric is water permeable and will shed light rain, but it is not a fully waterproof tarp for heavy storms.

Will it stand up to wind?
Permeable fabric and reinforced edges reduce wind load, but proper tensioning and sturdy anchors are important for windy sites.