ShadeMart 14 ft x 21 ft Blue Sun Shade Sail UPF50 Rectangle

In this review of the ShadeMart 14 ft x 21 ft blue rectangle shade sail, the bottom line is simple: it is a practical, heavy duty sun screen for outdoor areas where UV protection and airflow matter most. The sail is best for homeowners who need large, breathable coverage over a patio, carport, or poolside and want a durable woven fabric that cuts sunlight while letting water drain. Our review finds the product useful because its woven HDPE fabric blocks sunlight and reduces temperature without trapping moisture.

Key Features

• Woven HDPE fabric: provides strong, tear-resistant coverage that blocks up to 95% of harmful UV rays while remaining breathable.
• Stainless steel D rings: heavy duty corner attachments resist corrosion and make secure anchor points for mounting to posts, walls, or trees.
• Water permeable design: lets rain and air pass through the canopy so water does not pool and the covered area stays ventilated.
• Temperature reduction: cuts direct sunlight and can lower perceived temperatures by 10 to 15 degrees under the sail for more comfortable outdoor use.
• Custom sizing available: a range of sizes can be ordered so users can match the sail area to patios, pergolas, carports, or poolside layouts.
• Decorative rectangle shape: integrates with different outdoor styles and offers a simple, modern look while providing functional shade.

Who It's For

This shade sail is aimed at homeowners, renters with permission to anchor sails, and small businesses that need an affordable way to expand shaded outdoor seating without a permanent structure. It is particularly suited to patios, decks, carports, pergolas and pool areas where airflow and UV protection are priorities.

Those who need a fully waterproof canopy, a solid permanent roof, or precise architectural fittings should look elsewhere; this sail is intentionally breathable and water permeable and is sold as fabric with D rings and webbing rather than a complete custom hardware kit.

Pros & Cons

Pros

• High UV protection from the woven HDPE blocks most harmful sunlight for cooler shaded areas.
• Durable construction with stainless steel D rings and heavy white webbing for long life in outdoor conditions.
• Breathable and water permeable design avoids pooling and improves air circulation under the sail.
• Custom sizing options allow the sail to be tailored to a wide variety of outdoor spaces.

Cons

• Not waterproof, so it will not provide full rain protection during heavy storms.
• Styling appeal is mixed according to some customers, so aesthetic results may vary with installation and color choice.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	14 ft x 21 ft
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 harmful UV rays

Our Verdict

The ShadeMart 14 ft x 21 ft rectangle shade sail is a solid value for people who need broad, breathable sun protection without a roof. Its woven HDPE and stainless hardware deliver durability and strong UV blocking while allowing water and air to pass through, making it ideal for patios, pools, and carports where comfort and ventilation matter more than full rain cover.

Frequently Asked Questions

Is this shade sail waterproof?
The sail is water permeable and breathable, not waterproof, so it allows rain to pass through rather than shedding heavy rainfall.

Can I attach the sail to a tree or post?
Yes, with proper mounting hardware the stainless steel D rings and heavy webbing can be anchored to trees, posts, walls, or roofs.

Does it block UV rays?
Yes, the woven HDPE fabric blocks up to 95% of harmful UV rays and reduces perceived temperatures beneath the sail.