ShadeMart 6 ft x 21 ft Green Rectangle Sun Shade Sail - Breathable UV

Our review of the ShadeMart 6 ft x 21 ft Green Sun Shade Sail finds it best suited for homeowners and small business owners who need an affordable, heavy-duty fabric canopy that reduces heat and UV exposure without trapping moisture. The sail's woven HDPE material and stainless steel corner D rings make it a durable choice for patios, carports, pergolas and poolside covers, and the primary reason to buy is its combination of strong construction plus breathability that blocks up to 95% of harmful UV while allowing water and air to pass through.

Key Features

• Woven HDPE fabric: provides a durable, tear-resistant surface that stands up to outdoor use while remaining breathable.
• Stainless steel D rings: heavy-duty corner hardware attached to reinforced white webbing makes installation secure and long lasting.
• Water permeable: the sail lets rain and air pass through, preventing pooling and reducing wind load on the fabric.
• UV protection: blocks up to 95% of harmful UV rays and can lower temperatures beneath the canopy by roughly 10 to 15 degrees.
• Custom sizing available: a range of custom sizes lets you pick a sail to fit specific patios, carports or pool areas when standard sizes do not match.
• Decorative rectangle shape: a simple rectangular profile integrates easily with existing outdoor design while providing usable shaded area.

Who It's For

The ShadeMart rectangle shade sail is ideal for homeowners who want a practical, low-maintenance canopy for a patio, pergola, carport or pool equipment area and value UV reduction and airflow over waterproofing. It is also a good option for DIY installers who will attach the sail to poles, trees or building anchor points using appropriate hardware kits.

Those who need a fully waterproof shelter or who require complex tensioned architectural installations should look elsewhere; this product is specifically designed to be water permeable and breathable, not a sealed rainproof cover.

Pros & Cons

Pros

• Durable woven HDPE material with strong stitching delivers good longevity for outdoor use.
• Reinforced corners with stainless steel D rings and heavy webbing make mounting straightforward and secure.
• Effective UV blocking and measurable temperature reduction under the sail improves comfort in hot conditions.
• Custom sizing options allow a better fit for irregular or larger spaces.

Cons

• Not waterproof, so it will not provide full rain protection or act as a sealed shelter.
• Manual measurement variation means buyers must measure carefully to ensure the correct fit.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	6 ft x 21 ft
Material	Woven HDPE (High Density Polyethylene)
Corner Hardware	Stainless steel D rings with heavy duty white webbing
Functionality	Water permeable, breathable, UV resistant
UV Blockage	Up to 95%

Our Verdict

The ShadeMart 6 ft x 21 ft rectangle shade sail is a practical, value-oriented canopy for anyone needing durable UV protection with good airflow. It excels where breathability and temperature reduction matter, and when paired with proper hardware it is a reliable, low-cost way to add shade to patios, carports or pool areas. Buyers seeking full waterproof coverage should consider alternate products.

Frequently Asked Questions

Is this shade sail waterproof?
No, this style is water permeable and breathable, so it will not keep out rain but prevents pooling and improves airflow.

How is the sail mounted?
The sail has stainless steel D rings attached to reinforced white webbing and can be secured to poles, trees, walls or roofs with appropriate hardware kits.

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