17ft x 20ft Brown Sun Shade Sail UPF50 Rectangle - Breathable Outdoor

In this review the ShadeMart 17' x 20' brown rectangle shade sail is judged on durability, sun protection and everyday usefulness for patios, carports and pool areas. The single biggest reason to buy is its combination of a woven HDPE fabric that blocks up to 95% of UV while remaining water permeable and breathable, which keeps covered areas noticeably cooler. For anyone who needs a heavy duty, easy-to-install sun canopy that reduces heat without trapping water, this review finds it a practical, long-lasting option.

Key Features

• Material: Woven HDPE fabric offers a robust feel and resists fraying, delivering long-term protection from sunlight without the weight of canvas.
• UV Protection: Blocks up to 95% of harmful UV rays, which significantly lowers surface and air temperatures beneath the sail.
• Breathability: Water permeable construction allows rain and air to pass through, preventing pooling and reducing wind resistance during gusts.
• Hardware Ready: Stainless steel corner D rings attached to heavy duty webbing provide secure anchoring points for common shade mounting kits.
• Custom Fit: Available in custom sizes so you can match odd-shaped venues or cover larger areas while keeping the fabric area consistent.

Who It's For

The ShadeMart 17' x 20' rectangle is best for homeowners and small business owners who need a durable, breathable canopy for patios, carports, pergolas, or poolside areas and prefer a simple rectangular layout. It is also suited to boat owners and yard applications where sun blockage and airflow are priorities.

Those who need a fully waterproof cover, or who require a rigid frame-mounted awning with a sealed roof, should look elsewhere; this sail is specifically designed to be water permeable and to perform as a sun shield rather than a rainproof shelter.

Pros & Cons

Pros

• Provides strong sun protection and noticeably lowers temperatures under the sail.
• Durable woven HDPE fabric and stainless steel D rings give reliable long-term performance.
• Breathable, water permeable design prevents water pooling and reduces wind load.
• Easy to install with common hardware and available in custom sizes for a tailored fit.

Cons

• Not waterproof, so it will not keep you dry in steady rain.
• Manual measurement variations mean ordering a custom size requires careful measuring to avoid fit issues.

Specifications

Our Verdict

The ShadeMart 17' x 20' brown rectangle shade sail is a practical choice for anyone needing effective sun protection and airflow without a sealed roof. Its durable woven HDPE fabric and stainless D rings offer good value for outdoor shading projects, and the breathable design makes it especially useful for patios, pools and carports where moisture runoff and wind performance matter.

Frequently Asked Questions

Is this shade sail waterproof?
No, it is water permeable and breathable, designed to allow rain to pass through rather than act as a waterproof cover.

Will it significantly reduce temperature under the canopy?
Yes, the fabric blocks up to 95% of UV and can lower temperatures beneath the sail by roughly 10 to 15 degrees in typical conditions.

Can it be attached to poles, walls or trees?
Yes, the stainless steel D rings and heavy duty webbing allow attachment to poles, trees, walls or roofs when used with proper hardware kits.