21ft x 24ft x 31.9ft Blue Right Triangle Sun Shade Sail - Heavy Duty

In this review we look at the ColourTree custom size blue right triangle sun shade sail and why it makes sense for anyone who needs large, durable UV protection for patios, pools or carports. The bottom line: this is a purpose-built, heavy duty shade sail made from 190 GSM 100% virgin HDPE that blocks up to 95% of UV and resists fading and tearing, so buyers who want long-lasting sun protection in a custom size will appreciate it.

Key Features

• 190 GSM virgin HDPE: The thick, non-recycled fabric provides greater durability under prolonged sun exposure compared with recycled alternatives.
• UV stabilized compound: Fabric treated to resist drying out and fading, helping the sail keep its color and strength for years.
• 95% UV blockage: The woven mesh significantly reduces temperatures and harmful sunlight in the shaded area for comfortable outdoor use.
• Breathable, water-permeable weave: Air and rain pass through the fabric to prevent water pooling and reduce wind stress on the structure.
• Reinforced edges and stainless steel D-rings: Double layered stitched seams and heavy corner stitching improve the sail's stability and attachment security.
• Custom-made to order: Made to the specified 21' x 24' x 31.9' size with a 3-7 business day build time and a 3 year limited warranty.

Who It's For

The ColourTree 21' x 24' x 31.9' right triangle shade sail is for homeowners or small businesses who need a large custom-shaped canopy that prioritizes UV protection and durability. It is well suited to patios, pool decks, carports and open outdoor seating where a large triangular shade footprint is required.

Those who should look elsewhere include buyers who want a fully waterproof canopy (this is a breathable mesh designed to allow water through) or people who need a pre-fitted mounting kit included (hardware is sold separately and high-quality cables and fittings are recommended).

Pros & Cons

Pros

• High-quality 190 GSM virgin material that resists fading and tearing under long sun exposure.
• Blocks up to 95% of UV while allowing air and rain to pass through, reducing heat buildup and water pooling.
• Strong construction with reinforced seams and stainless steel D-rings for secure installation.
• Custom size option with a 3 year limited warranty provides assurance and fit for specific spaces.

Cons

• Installation hardware is not included, so buyers must purchase suitable cables and fittings separately for best performance.
• As a breathable mesh it does not provide full waterproof coverage in heavy storms.

Specifications

Size	21' x 24' x 31.9' (right triangle)
Material	190 GSM 100% virgin HDPE mesh
UV Protection	Up to 95% UV blockage
Construction	Double layered reinforced stitched seams with stainless steel D-rings
Breathability	Woven fabric allows air and water to pass through
Warranty	3 year limited warranty
Lead time	Custom made in 3-7 business days

Our Verdict

This large 21' x 24' x 31.9' blue right triangle shade sail is a solid value for anyone needing durable, high-UV protection in a custom size. Its 190 GSM virgin HDPE and reinforced construction deliver longevity and reliable shade; just plan to buy a quality hardware kit separately and accept that it is a breathable mesh rather than a waterproof canopy.

Frequently Asked Questions

Is hardware included?
Installation hardware and cables are sold separately; the sail has stainless steel D-rings and each D-ring requires one cable for proper mounting.

Will it block most of the sun?
Yes, the woven fabric blocks up to 95% of harmful UV and reduces heat in the shaded area.

How long does it last outdoors?
The fabric is 190 GSM virgin HDPE treated with UV stabilizers and comes with a 3 year limited warranty; lab testing indicated stronger UV durability versus recycled material.