ShadeMart 17ft x 23ft Black Sun Shade Sail Rectangle - UPF50 Outdoor

In this review of the ShadeMart 17' x 23' Black Sun Shade Sail, the bottom line is simple: it is a practical, heavy duty rectangle canopy for homeowners who need reliable sun protection over patios, carports or boats. The single biggest reason to buy is its combination of breathable HDPE fabric and stainless steel corner D rings, which together deliver durable shade that lowers temperatures and survives outdoor conditions while remaining easy to install.

Key Features

• Material: Woven HDPE fabric provides a durable, tear-resistant surface that blocks up to 95% of harmful UV rays to reduce heat.
• Hardware: Stainless steel corner D rings attached to heavy duty white webbing give secure mounting points that resist rust and pulling.
• Breathability: The water permeable, breathable weave lets water and air pass through so the canopy reduces wind load and sheds rain rather than pooling.
• Temperature reduction: The fabric can significantly lower temperatures beneath the sail, helping outdoor spaces feel cooler by an estimated 10 to 15 degrees.
• Custom sizing: ShadeMart offers a range of custom sizes so buyers can order a sail sized to their venue when the standard 17' x 23' footprint is not ideal.

Who It's For

This shade sail is best for homeowners, renters with outdoor areas, and small business owners who need a cost-effective sun-protection solution for patios, carports, pergolas, pool areas or to cover a boat. People who value airflow and UV protection over full waterproofing will appreciate the breathable HDPE fabric and the substantial hardware.

It is less suitable for buyers who need a fully waterproof canopy or decorative details beyond a simple rectangular sail; if you need complete rain protection, a coated or sealed fabric product would be a better choice.

Pros & Cons

Pros

• Blocks up to 95% of UV rays, offering strong sun protection for outdoor living spaces.
• Durable construction with woven HDPE and stainless steel D rings that customers report holds up to wind and hail.
• Breathable, water permeable design prevents pooling and improves airflow under the sail.

Cons

• Not waterproof, so it will not provide full rain protection during heavy storms.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	17' x 23'
Material	Woven HDPE (High Density Polyethylene)
Corner Hardware	Stainless steel D rings on heavy duty white webbing
Functionality	Water permeable, breathable, UPF50 sun protection

Our Verdict

The ShadeMart 17' x 23' Black Sun Shade Sail is a practical value for those who need reliable UV protection and airflow over patios, carports or boats. Its sturdy HDPE fabric and stainless corner fittings make it durable and easy to mount, and while it is not waterproof the breathable design reduces heat and prevents pooling, making it a smart choice for everyday outdoor shade.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is water permeable and breathable so it allows water to pass through rather than provide full waterproof coverage.

Can it be mounted to trees or posts?
Yes. With appropriate hardware kits, the corner D rings and webbing allow attachment to poles, trees, walls, roofs and similar structures.

Does it block UV rays?
Yes. The woven HDPE fabric blocks up to 95% of harmful UV rays and helps lower temperatures beneath the sail.