Custom Size 11ft x 12ft x 16.3ft Right Triangle Sun Shade Sail - Cool

In this review the reviewer looks at the Custom Size 11' x 12' x 16.3' Blue Right Triangle Sun Shade Sail and finds it best for homeowners or small businesses who need strong sun protection and a tailored fit. The single biggest reason to buy is the combination of a customized D-ring-to-D-ring measurement approach and substantial 95% sun protection, which makes it useful where a precise, durable shade solution is needed for patios, play areas, or outdoor dining. Installation is straightforward for someone willing to plan anchor points carefully.

Key Features

• 95% UV blockage: The 200 GSM HDPE fabric blocks up to 95% of harmful UV rays for safer time outdoors and reduced sun exposure risk.
• Temperature reduction: The sail can lower ambient temperature by up to 15 degrees vs unshaded areas, making patios and seating areas noticeably cooler.
• Custom fit by D-ring to D-ring: Measurements are taken between D-rings so the finished sail matches your planned anchor points and site geometry.
• Durable construction: Reinforced edges, stainless steel D-rings and double-layer stitching improve longevity and resist fraying at attachment points.
• Water and air permeable: The woven HDPE fabric allows airflow and water to pass, helping avoid wind strain and puddling during light rain.
• 3-year assurance: The product comes with a three-year assurance that covers construction defects and gives extra confidence in material quality.

Who It's For

This shade sail is for homeowners, small commercial operators and renters who want a tailored, heavy-duty sun sail for patios, decks, pools or outdoor seating where a precise triangular fit is needed. People who value a measured D-ring to D-ring fit and robust materials will appreciate the customizable fit approach and stainless steel hardware.

It is less suitable for buyers who expect a rigid waterproof canopy or who cannot install secure anchor points. If you need a fully waterproof awning, a different product with sealed fabric and a slope for run-off would be preferable.

Pros & Cons

Pros

• High UV protection that blocks up to 95% of sun rays and reduces heat under the sail.
• Custom sizing from D-ring to D-ring yields a precise fit for irregular spaces.
• Solid build quality with reinforced edges, double-layer stitching and stainless steel D-rings.
• Permits airflow and light rain to pass, reducing wind load and pooling risks.

Cons

• Durability has mixed real-world reports; a minority of users experienced faster degradation in very harsh sun exposure.
• Not fully waterproof, so heavy downpours will not be fully blocked.

Specifications

Product shape	Right triangle
Size (D-ring to D-ring)	11' x 12' x 16.3'
Material	200 GSM HDPE
UV protection	Up to 95% blockage (UPF50+)
Hardware	Stainless steel D-rings, reinforced edges
Permeability	Water and air permeable
Assurance	3 years

Our Verdict

The Custom Size 11' x 12' x 16.3' Right Triangle Sun Shade Sail is a good value for anyone needing a tailored, heavy-duty shade that cuts heat and blocks most UV rays. Its durable construction and measurable D-ring sizing make it a practical choice for patios, poolsides and commercial seating where a specific fit matters, though buyers in very wet or extreme UV climates should plan for periodic replacement.

Frequently Asked Questions

Is this sail waterproof?
The fabric is water and air permeable, so it sheds light rain by letting water pass through but is not fully waterproof for heavy rainfall.

How are custom sizes measured?
Measure from D-ring to D-ring at each corner; the sail is produced to those D-ring-to-D-ring dimensions for a precise fit.

How long does it last in sun exposure?
Construction is robust with a 3-year assurance, but customer experience varies; many report over a year of good service, while a few noted faster degradation in very harsh conditions.