ShadeMart 14 ft x 21 ft Blue Rectangle Sun Shade Sail - Breathable UV

In this review the ShadeMart 14' x 21' Blue Sun Shade Sail is evaluated for homeowners and small-business owners who need a durable, breathable canopy that reduces heat and blocks sun without trapping water. The bottom line: this rectangle HDPE fabric sail is best for patios, carports and poolside spots where you want reliable UV protection and airflow. It is not waterproof, but its woven construction and reinforced stainless steel D rings make it a practical, long-lasting shade solution that cuts direct sunlight and drops surface temperatures noticeably.

Key Features

• Woven HDPE fabric: provides a sturdy, tear-resistant canopy that lets air pass through while blocking most sunlight for cooler shade.
• Stainless steel D rings: heavy duty corner hardware attached to white webbing gives secure anchor points for reliable tensioning.
• Water and air permeable: the sail drains and breathes so it will not pool water and helps reduce heat buildup under the canopy.
• UV resistance: blocks up to 95% of harmful UV rays, lowering temperatures on patios and carports for improved comfort.
• Custom sizes available: multiple size options and a custom-order process let buyers fit the sail to irregular spaces when measured accurately.
• Rectangle styling: simple shape and multiple color choices make the sail a decorative yet functional addition to outdoor living areas.

Who It's For

The ShadeMart rectangle sail is aimed at homeowners, renters and small businesses who need an affordable, heavy duty shade for patios, pergolas, carports and pool zones where water permeability and airflow matter. It is a good choice for DIY installers who plan to use proper hardware kits and attach points such as poles, trees or building anchors.

Those who should look elsewhere include buyers who need a fully waterproof canopy or require a rigid framed structure; this style is explicitly water permeable and designed to breathe rather than shed all rain. Also measure carefully if precise coverage is required, since manual measurements can cause slight variations.

Pros & Cons

Pros

• Durable woven HDPE fabric and reinforced stitching deliver reliable long-term performance.
• Stainless steel corner D rings and heavy duty webbing make for sturdy attachment points and easier installation.
• Effective at blocking sunlight and reducing patio surface temperatures, making outdoor spaces more comfortable.
• Custom sizing and multiple colors allow the sail to fit a variety of outdoor designs and spaces.

Cons

• Not waterproof, so it will not keep an area dry during heavy rain.
• Size can vary slightly due to manual measurements, so exact coverage may differ from expectations.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	14' x 21'
Material	Woven HDPE (High Density Polyethylene)
Corner hardware	Stainless steel D rings with heavy duty white webbing
Water resistance	Water permeable (not waterproof)
UV protection	Blocks up to 95% of UV rays

Our Verdict

The ShadeMart 14' x 21' rectangle shade sail is a strong value for anyone needing breathable, UV-blocking coverage for patios, carports or pool areas. Its HDPE fabric, reinforced corners and custom size options make it versatile and durable, but buyers who need full waterproofing should consider a different style. Overall it is a solid, economical way to add shade and reduce heat outdoors.

Frequently Asked Questions

Is this sail waterproof?
The sail is water permeable and breathable, not waterproof, so it will not keep heavy rain from passing through.

Can it be cut to a custom size?
Custom sizes are available; allow 3 to 7 business days for manufacturing and measure the installation area carefully.

What attachment points work?
With the proper hardware kit the sail can be mounted to poles, trees, walls or roofs using the stainless steel D rings and webbing.