ShadeMart 12 ft x 20 ft Blue Sun Shade Sail UPF50 Rectangle Canopy

In this review of the ShadeMart 12' x 20' Blue Sun Shade Sail, the bottom line is simple: it is for homeowners and small businesses that need a durable, breathable sun screen that meaningfully lowers outdoor temperature while resisting UV damage. The reviewer found the woven HDPE fabric and stainless steel corner D rings to be practical for patio, carport, or poolside use, and the sail's water-permeable construction means it sheds rain without pooling. If you want solid sun protection and airflow rather than a waterproof tarp, this shade sail is worth considering.

Key Features

• Woven HDPE fabric: provides a strong, tear-resistant canopy that blocks up to 95% of harmful UV rays for reliable sun protection.
• Stainless steel D rings: attached to heavy-duty white webbing for secure anchor points that hold up under tension and repeated use.
• Water and air permeable: allows rain and breeze to pass through so water does not pool and shaded areas stay more comfortable.
• Temperature reduction: the sail noticeably lowers ambient temperature under the canopy by about 10 to 15 degrees, improving comfort on hot days.
• Custom size options: a range of custom sizes is available so the sail can be matched to patios, pergolas, carports, and yards when measured accurately.
• Decorative rectangle shape: integrates with existing outdoor design while serving as a versatile shading solution across many mounting options.

Who It's For

The ShadeMart 12' x 20' rectangle sail is best for homeowners, renters with permission to anchor lines, and small commercial spaces that want strong sun protection without a solid roof. It suits patios, pool areas, carports and pergolas where airflow and UV resistance matter more than complete waterproofing. For those prioritizing easy installation, the stainless steel D rings and webbing make standard rigging straightforward when paired with a proper hardware kit.

Those who should look elsewhere include buyers who need a waterproof canopy or an exact factory-cut geometric rectangle; customers note size can vary slightly with manual measurements, and this style is explicitly not waterproof. If you require a rainproof shelter, choose a dedicated waterproof awning instead.

Pros & Cons

Pros

• High UPF protection and woven HDPE material deliver solid sun blocking and durability.
• Breathable design prevents pooling and allows cooling airflow beneath the canopy.
• Stainless steel D rings with heavy webbing provide dependable attachment points and simple installation.
• Available in custom sizes and multiple colors to match different outdoor setups.

Cons

• Not waterproof, so it will not fully shelter from heavy rain or storms.
• Some customers report mixed sizing feedback, so careful measurement is required before ordering.

Specifications

Brand	ShadeMart
Model Size	12' x 20' rectangle
Material	Woven HDPE (High Density Polyethylene)
UV Protection	Blocks up to 95% of harmful UV rays (UPF50)
Corner Hardware	Stainless steel D rings with heavy duty white webbing
Breathability	Water and air permeable (not waterproof)
Custom Options	Custom sizes available; measure venue accurately

Our Verdict

The ShadeMart 12' x 20' Blue Sun Shade Sail is a practical, cost-effective choice for anyone who needs robust sun protection, airflow, and a durable mounting system rather than a waterproof cover. With strong woven HDPE fabric and stainless steel D rings, it delivers good value for patios, pools, and carports when measured and installed properly.

Frequently Asked Questions

Is this shade sail waterproof?
It is water permeable and breathable, not waterproof, so it will allow rain to pass through rather than provide full rain protection.

How much UV protection does it offer?
The woven HDPE material blocks up to about 95% of harmful UV rays and carries a UPF50 level of protection.

Can it be custom sized?
Yes, ShadeMart offers a selection of custom sizes, but customers should measure the installation area carefully since manual measurements may vary.