11 ft x 21 ft x 23.7 ft Black Right Triangle Sun Shade Sail - Heavy

In this review of the 11 ft x 21 ft x 23.7 ft black right triangle sun shade sail, the bottom line is simple: it is a durable, high-coverage option for patios, pools and carports where long-term UV protection matters. The reviewer found the 190 GSM virgin HDPE fabric and UV stabilized compound to be the single biggest reason to buy, because that combination delivers stronger resistance to fading and tearing than recycled alternatives while still allowing airflow and water permeability.

Key Features

• 190 GSM virgin HDPE: Thick, non-recycled material gives a robust feel and resists tearing under regular sun exposure.
• UV stabilized compound: Fabric treated to slow drying and fading, which helps retain strength and appearance after extended sun exposure.
• 95% UV blockage: Effectively reduces direct sunlight and heat in shaded areas, making patios and pools noticeably cooler.
• Breathable woven design: Allows water and air to pass through, preventing water pooling and reducing wind stress on the sail.
• Reinforced edges and stainless D-rings: Double-layer stitched seams and heavy stitching at corners improve attachment strength and reduce fraying.
• Three year limited warranty: Warranty provides added confidence for normal weather use and routine installation.

Who It's For

This right triangle sail is a good fit for homeowners or small business owners who need a large, fixed-shade solution for a patio, swimming pool area, balcony or carport and who value long-term UV resistance. It works especially well in sunny, high-UV climates where fabric durability and color retention are important.

Those who need a very small shade, a temporary pop-up canopy, or fully waterproof roofing should look elsewhere; this product is a breathable HDPE shade sail designed to reduce heat and block UV rather than act as a rainproof shelter.

Pros & Cons

Pros

• Durable 190 GSM virgin HDPE feels thicker and stood up well to sunny conditions in use.
• Blocks about 95% of harmful UV, noticeably reducing temperature under the sail.
• Reinforced seams and stainless steel D-rings make for a secure, tidy installation when paired with proper hardware.
• Breathable fabric prevents water pooling and reduces wind load compared with solid covers.

Cons

• Installation hardware is sold separately, so buyers must plan for cables and fittings to mount the sail securely.
• Not fully waterproof, so it will not provide complete rain protection.

Specifications

Our Verdict

The 11 ft x 21 ft x 23.7 ft black right triangle shade sail is a practical, value-led choice for anyone needing durable UV protection with breathable performance. Its 190 GSM virgin HDPE and reinforced construction make it a solid long-term option for patios and pools, provided buyers budget for separate installation hardware and do not expect full waterproofing.

Frequently Asked Questions

Does this sail block most UV light?
Yes, the woven fabric is rated to block about 95% of harmful UV, reducing sun exposure and heat beneath the sail.

Is the fabric waterproof?
No, the HDPE weave is breathable and allows water to pass through to avoid pooling; it is not designed as a waterproof roof.

Are mounting fittings included?
No, installation hardware kits and cables are sold separately and are required to secure each D-ring.