21ft x 21ft x 21ft Brown Triangle Sun Shade Sail - 95% UV Protection

Our review of this 21' triangle sun shade sail finds it best suited for homeowners and small commercial spaces that need a tailored shade solution. The single biggest reason to buy is its reliable sun protection: made from 200 GSM HDPE fabric that blocks up to 95% of UV radiation while still allowing air and water to pass through, it cools sheltered areas by up to 15 degrees and stands up to regular outdoor use. Installation requires planning and accurate D-ring to D-ring measurements, but the result is a neat, durable canopy that delivers consistent shade.

Key Features

• 95% UV blockage: The 200 GSM HDPE fabric reduces sun exposure for people and furnishings, lowering UV risk while outdoors.
• Temperature reduction: The shade sail can reduce ambient temperature by up to 15 degrees compared with unshaded areas, improving comfort on hot days.
• Permeable design: Water and air permeability prevent pooling and allow airflow, which helps the sail resist wind uplift and dry quickly after rain.
• Custom sizing: Measured D-ring to D-ring, the sail is made to fit requested dimensions so it can cover irregular or specific spaces.
• Reinforced durability: Stainless steel D-rings, reinforced edges and double-layer stitching reduce fraying and extend usable life, backed by a 3 year assurance.

Who It's For

This shade sail is a good choice for backyard patios, playgrounds, chicken runs or small commercial outdoor seating where tailored coverage and strong UV protection matter. Buyers who plan the installation and can provide exact corner-to-corner measurements will get the cleanest fit and performance.

It is not ideal for someone who expects a ready-to-install, fixed-size pop-up canopy or who needs a fully waterproof shelter; the fabric is water permeable by design and sizing must be customized rather than chosen from fixed boxed options.

Pros & Cons

Pros

• High sun protection from 200 GSM HDPE fabric that blocks about 95% of UV rays.
• Noticeable cooling of shaded areas, reported up to 15 degrees lower than unshaded spots.
• Durable construction with stainless steel D-rings and reinforced, double-stitched edges plus a 3 year assurance.
• Custom sizing allows fitting to irregular spaces and preferred shapes.

Cons

• Customers report the supplied size can feel smaller than expected, so precise measurement and allowance are critical.
• Not fully waterproof; it is designed to be water and air permeable rather than a rainproof canopy.

Specifications

Our Verdict

For anyone who needs a durable, high-coverage shade sail that reduces UV exposure and lowers temperature, this custom-size triangle sail is a sensible value. It performs well in sun and wind when measured and installed correctly, offering commercial-grade hardware and a multi-year assurance that justify choosing a tailored fit over off-the-shelf options.

Frequently Asked Questions

Is this shade sail waterproof?
Answer. No; the 200 GSM HDPE fabric is water and air permeable, which prevents pooling but does not make it fully waterproof.

How should I measure for a custom sail?
Answer. Measure from D-ring to D-ring for each corner and allow the recommended gap at mounting points; accurate measurements ensure the best fit.

Will it reduce temperature under the sail?
Answer. Yes; the sail can reduce temperature by up to about 15 degrees in shaded areas compared with direct sun.