11ft x 13ft Red Sun Shade Sail UPF50 Rectangle - Cool, Breathable

In this review of the ShadeMart 11' x 13' Red Sun Shade Sail, the bottom line is simple: this rectangle UPF50 shade is best for homeowners or small-business owners who want reliable sun protection and airflow for a patio, carport or poolside area. The single biggest reason to buy is its combination of woven HDPE fabric and stainless steel corner D rings, which delivers durable, UV-blocking coverage while remaining water permeable and breathable so heat and moisture do not build under the canopy.

Key Features

• Material: Woven HDPE fabric provides a durable, tear-resistant surface that blocks up to 95% of harmful UV rays for long-term sun protection.
• Hardware: Stainless steel corner D rings attached to heavy duty white webbing offer secure anchor points for common mounting setups like poles or walls.
• Breathability: Water permeable and breathable weave allows rain and air to pass through, reducing pooling and keeping the covered area cooler.
• Heat reduction: The fabric significantly lowers temperatures under the sail, typically by around 10 to 15 degrees, improving outdoor comfort on hot days.
• Custom sizing: Available in multiple sizes and customizable dimensions so buyers can select a fit for irregular or specific outdoor spaces.
• Styling: Rectangle shape and bold red color make the sail a decorative addition that integrates with patio or poolside design.

Who It's For

The ShadeMart rectangle shade sail is aimed at homeowners, renters with permission to mount hardware, and small businesses that need a durable, breathable sun cover for patios, carports, pergolas or pool areas. It is particularly useful where airflow and reduced heat are priorities because the fabric is water permeable and helps lower temperatures.

People who need a fully waterproof canopy or who require a perfectly rigid rectangular geometry for precision engineering should look elsewhere; the sail is not waterproof and manual measurements can produce slight shape variations even though the fabric area remains constant.

Pros & Cons

Pros

• High UPF protection and woven HDPE construction provide strong UV blocking and long-term durability.
• Stainless steel D rings and heavy webbing make installation secure with standard hardware kits.
• Water permeable design prevents water pooling and maintains airflow for a cooler shaded area.
• Custom size options and vibrant colors add practical flexibility and visual appeal.

Cons

• Not waterproof, so it will not provide full rain protection during heavy storms.
• Some buyers report size or shape variance due to manual measurement, so careful measuring is required before purchase.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	11' x 13'
Material	Woven HDPE (High Density Polyethylene)
UV Protection	Blocks up to 95% of UV rays (UPF50)
Hardware	Stainless steel corner D rings with heavy duty white webbing
Water Resistance	Water permeable, not waterproof

Our Verdict

The ShadeMart 11' x 13' rectangle shade sail is a practical, value-oriented choice for those who prioritize sun protection, airflow and ease of installation. It delivers strong UV blocking, sturdy attachment points and cooling performance, making it a good buy for patios, carports and poolside spaces as long as full waterproofing is not required.

Frequently Asked Questions

Is this shade sail waterproof?
Answer. No, the fabric is water permeable and breathable, so it will not provide full waterproof coverage but prevents pooling.

Will this block most of the sun?
Answer. Yes, the woven HDPE fabric blocks up to 95% of harmful UV rays and provides significant heat reduction under the sail.

Can it be mounted to trees or poles?
Answer. Yes, with the proper hardware kits the stainless steel D rings and webbing allow attachment to poles, trees, walls or roofs.