Custom Size 21ft x 21ft Red Triangle Sun Shade Sail - UPF50

In this review the reviewer looks at the Amgo custom size 21' x 21' x 21' red triangle shade sail and concludes it is a strong option for homeowners and small businesses who need reliable sun protection with a tailored fit. The single biggest reason to buy is its combination of heavy 200 GSM HDPE construction and 95% UV blockage, which delivers real shade and measurable temperature reduction while staying breathable and durable for outdoor use.

Key Features

• 95% Sun Protection: The fabric blocks up to 95% of UV rays to reduce direct sun exposure for people and furnishings beneath the sail.
• 200 GSM HDPE Material: Commercial-grade fabric gives a sturdy, long-lasting canopy that holds up under sun and wind.
• Temperature Reduction: The sail can lower ambient temperature by up to 15 degrees compared to unshaded areas, making patios and play areas noticeably cooler.
• Customizable Fit: Made to order from D-ring to D-ring so the sail can be tailored to the exact triangle span required for a given space.
• Durable Hardware and Stitching: Stainless steel D-rings, reinforced edges and double-layer stitching prevent fraying and extend usable life, backed by a 3 year assurance.

Who It's For

The Amgo triangle shade sail is suited to homeowners, cafes, playgrounds and patios that need a large, attractive canopy that actually blocks UV and cuts heat. It is particularly useful where a custom span is needed and where the installer can secure each corner to a post, wall or tree with a small clearance for tension.

Those who should look elsewhere include buyers wanting a fully waterproof canopy or a rigid pergola solution; this product is water and air permeable by design. Also, if you need a ready-made small umbrella-style shade, a custom 21' triangle may be oversized and more than required.

Pros & Cons

Pros

• High UV blockage and tangible temperature reduction under the sail.
• Commercial 200 GSM HDPE fabric and reinforced construction for long life.
• Custom sizing from D-ring to D-ring yields a precise fit for irregular spaces.
• Stainless steel D-rings and double-layer stitching increase durability and reliability.

Cons

• Some customers note size can feel smaller than expected, so exact measuring is important before ordering.
• Because it is water and air permeable, it will not provide full rain protection like a coated waterproof canopy.

Specifications

Our Verdict

The Amgo custom triangle shade sail is a practical, good-value choice for anyone needing a large, breathable sun canopy that blocks UV effectively and cools outdoor spaces. Its commercial-grade 200 GSM fabric, reinforced hardware and customization option make it particularly worthwhile for patios, play areas and small outdoor businesses that need tailored coverage rather than a generic size.

Frequently Asked Questions

Can this sail be trimmed for a tighter fit?
Yes, the sail is made to order from D-ring to D-ring and the maker offers customization for straight edges or adjusted spans.

Is the sail waterproof?
No, the 200 GSM HDPE fabric is water and air permeable, so it provides shade and reduces heat but not full rain protection.

How should corners be spaced from posts?
For best performance each corner should leave at least 0.5 ft gap between D-rings and poles, or reduce by 1 to 1.5 ft per side when installing as guidance suggests.