Sun Shade Sail 11ft x 20ft Dark Grey Rectangle Canopy - UV Block

In this review of the Sun Shade Sail 11' x 20' rectangle canopy, the bottom line is simple: this is a practical, heavy-duty shade solution for homeowners who want reliable UV protection and breezy coverage for patios, decks, or pergolas. The sail delivers on its main promise by blocking up to 95% of UV rays while allowing air and light to pass, so it cools outdoor spaces without creating a sealed, hot cover. Installation is straightforward for anyone comfortable with basic hardware and a little measuring, and the knitted high-density polyethylene fabric feels durable rather than flimsy.

Key Features

• High shading rate: The canopy provides a 90%-95% shading rate for effective sun protection and much less direct sunlight on patios and decks.
• UV blocking fabric: Made from high-density polyethylene without recycled materials, the sail blocks up to 95% of harmful UV rays while allowing cooling breezes.
• Stitching and hardware: Cut from a complete mesh and finished with double strength stitched seams plus 4 anti-rust D-rings for secure anchoring.
• Curved edge design: Curved edges help prevent sagging and improve overall shade coverage and appearance compared with flat edges.
• Permeable to rain and air: The knitted mesh lets raindrops and air through, reducing wind resistance and keeping the area cooler than solid covers.

Who It's For

This shade sail is best for homeowners and renters who need an affordable, durable way to add substantial sun protection to outdoor seating areas, play spaces, or garden areas. It works well for people who prefer a breathable cover that reduces heat while still letting a bit of dappled light through.

It is not ideal for those seeking a fully waterproof solution or for installations that require exacting dimensional tolerances; the fabric is measured from D-ring to D-ring with a tolerance and accessories for mounting are sold separately. If you need a waterproof canopy or want a pre-rigged mounting kit, look to other products or add the recommended fittings.

Pros & Cons

Pros

• Excellent UV protection, blocking up to 95% of UV rays for safer outdoor time.
• Durable construction with double strength stitched seams and anti-rust D-rings for longevity.
• Breathable knitted mesh keeps the space cooler and reduces wind uplift compared with solid tarps.
• Curved edges help prevent sagging and improve visual appeal once installed.

Cons

• Not waterproof, so it will not keep rain out of the covered area in a downpour.
• Mounting hardware is not included, and size is measured D-ring to D-ring with a tolerance that requires careful planning.

Specifications

Product type	Rectangle shade sail canopy
Size	11' x 20'
Shading rate	90%-95% (dark grey)
Material	High-density polyethylene knitted mesh (no recycled materials)
Hardware	4 anti-rust D-rings included, 4 cords included
Design	Curved edges to reduce sagging
Weather notes	Permeable to air and raindrops; not waterproof

Our Verdict

The Sun Shade Sail 11' x 20' is a sensible purchase for anyone who wants strong sun protection with breathable coverage and durable construction. It offers excellent value for patios, decks, and pergolas where UV blocking and airflow matter more than full waterproofing, though buyers should plan for separate mounting hardware and allow for measurement tolerance.

Frequently Asked Questions

Is the sail waterproof?
No. The knitted mesh is permeable to raindrops so it will not keep water out during rain.

Are mounting accessories included?
The sail includes 4 cords and 4 anti-rust D-rings, but recommended mounting hardware or hooks should be purchased separately.

How much sun does it block?
The dark grey version blocks about 90%-95% of sunlight and up to 95% of UV rays according to the product details.