ShadeMart 20 ft x 23 ft Black Rectangle Sun Shade Sail - UPF50

In this review of the ShadeMart 20' x 23' Black Sun Shade Sail the bottom line is simple: it is a practical, heavy duty rectangle canopy for anyone who needs large-area sun protection without trapping heat. The sail is best for patios, carports, pergolas or boats where durable, breathable coverage is required. The reviewer found the fabric blocks intense sunlight, cuts temperatures noticeably, and installs with common hardware; it is not waterproof, so buyers who need complete rain cover should look elsewhere.

Key Features

• Material: The woven HDPE fabric delivers strong, tear-resistant coverage that stands up to sun and wind.
• UV protection: Rated UPF50 and advertised to block up to 95% of harmful UV rays, it reduces direct sun and lowers ambient temperatures.
• Breathability: Water permeable weave allows rain and air to pass through, preventing pooling and reducing wind load on the sail.
• Hardware ready: Stainless steel D rings stitched to heavy duty white webbing provide secure anchor points for standard shade hardware kits.
• Custom sizing: A range of custom size options lets buyers match the sail to awkward or specific outdoor spaces when measured accurately.
• Styling: The rectangle shape and solid black color integrate cleanly with many outdoor designs as both a functional and decorative element.

Who It's For

The ShadeMart 20' x 23' sail suits homeowners and small businesses who need a large, durable sun shade for a patio, carport, poolside, or boat cover where breathable, UV-blocking fabric is preferred over waterproof canopies. It is also a good fit for DIY installers who have or plan to buy compatible hardware kits and anchor points like poles, trees, or walls.

It is not the right choice for buyers who require a waterproof shelter or who want a rigid, permanent roof replacement; because the weave is water permeable it will let rain through and will not fully block wind-driven spray.

Pros & Cons

Pros

• Blocks a high percentage of UV, helping to lower temperatures under the sail.
• Durable woven HDPE fabric and stainless steel D rings make the sail long-lasting and reliable.
• Breathable, water permeable design prevents water pooling and reduces wind stress on mounts.
• Easy to integrate into many outdoor setups and available in custom sizes for a tailored fit.

Cons

• Not waterproof, so it will not provide complete rain protection during heavy downpours.
• Manual measurement and cutting may lead to slight size variations; accurate measuring is required.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	20' x 23'
Material	Woven HDPE (High Density Polyethylene)
UV Rating	UPF50 (blocks up to 95% UV)
Hardware	Stainless steel D rings attached to heavy duty webbing
Water Resistance	Water permeable / breathable (not waterproof)

Our Verdict

The ShadeMart 20' x 23' Black Sun Shade Sail is a solid value for anyone needing large-area, breathable sun protection that reduces heat and UV exposure. Its heavy duty HDPE fabric and stainless D rings deliver durability, and the permeable design prevents pooling and reduces wind stress. Choose this sail when you want effective shade and airflow; avoid it if you need a fully waterproof cover.

Frequently Asked Questions

Is this shade sail waterproof?
The sail is water permeable and breathable, so it will allow water to pass through and is not intended as a waterproof cover.

What are the attachment points made of?
Corner D rings are stainless steel and are sewn into heavy duty white webbing for secure anchoring with standard hardware kits.

Can I order a different size?
Yes, ShadeMart offers custom sizes; measure your installation area carefully before ordering because manual measurements may vary slightly.