Sun Shade Sail 16 ft x 20 ft Dark Grey Rectangle - Cool, UV Blocking

In this review of the 16 ft x 20 ft dark grey rectangle sun shade sail, the bottom line is simple: it is a practical, durable canopy for homeowners who want strong sun protection without a solid roof. The sail is best for patios, decks and backyard seating areas where shade and airflow matter; its high-density polyethylene weave blocks up to 95% of UV rays while still letting cooling breezes through. Installation is straightforward for anyone comfortable with basic mount points, and the curved-edge design helps avoid sagging and improves overall coverage.

Key Features

• High shading rate: The dense knit fabric delivers a 90%-95% shading rate to substantially reduce direct sunlight and UV exposure.
• UV protection: Made from non-recycled high-density polyethylene, the canopy blocks 95% of UV rays to protect people and surfaces beneath it.
• Permeable mesh: The woven design allows cooling breezes and light rain to pass through so the area below remains ventilated.
• Reinforced corners: Each corner has an anti-rust D-ring and double-stitched seams to resist tearing under tension.
• Curved edge design: Curved edges reduce sagging when tensioned and improve the sail's shading performance and appearance.
• Includes cords: Four cords are supplied to assist with mounting to nearby fixings when hardware is added.

Who It's For

This shade sail is ideal for homeowners with patios, decks or play areas who want a durable sun-blocking solution that still feels open to airflow. It suits anyone looking for an attractive rectangle canopy that improves outdoor comfort while limiting UV exposure during afternoon sun.

People who need a fully waterproof cover, a custom mounting kit included, or an exact rigid structure should look elsewhere; accessories and mounting hardware are not included and heavy rain will pass through the permeable fabric rather than bead off.

Pros & Cons

Pros

• High-quality material provides strong UV protection and durable wear over seasons.
• Curved edges and double-stitched seams reduce sagging and improve long-term shape retention.
• Allows airflow and light rain to pass, keeping the shaded area cooler than a solid roof.
• Included cords and anti-rust D-rings make tensioning and anchoring straightforward.

Cons

• Not waterproof; heavy rain will penetrate the permeable fabric rather than shed off.
• Mounting hardware must be purchased separately if secure anchor points are not already available.

Specifications

Product type	Rectangle sun shade sail
Size	16 ft x 20 ft
Color	Dark grey
Material	High-density polyethylene knitted mesh
Shading rate	90% - 95% (white series 80% - 85%)
UV block	Blocks up to 95% of UV rays
Included	4 cords and 4 anti-rust D-rings

Our Verdict

The 16 ft x 20 ft dark grey rectangle sun shade sail is a sensible value for anyone wanting reliable shade and UV protection for patios and backyards without blocking airflow. It is cost-effective, holds shape well thanks to curved edges and reinforced corners, and is best for users who can provide or purchase mounting hardware and do not require a waterproof canopy.

Frequently Asked Questions

Is this shade sail waterproof?
The fabric is permeable and not waterproof; light rain will pass through and heavy rain will not be shed.

Does it come with mounting hardware?
The sail includes cords and anti-rust D-rings, but mounting hardware or hooks are not included and should be bought separately if needed.

How much UV does it block?
Made from high-density polyethylene, it blocks up to 95% of UV rays while allowing airflow.