ShadeMart 17 ft x 20 ft White Sun Shade Sail UPF50 Rectangle

In this review of the ShadeMart 17' x 20' White Sun Shade Sail, the bottom line is simple: this rectangular UPF50 canopy is best for homeowners and small-business owners who want durable, breathable sun protection that reduces heat without trapping water. The reviewer found the woven HDPE fabric and stainless steel corner D rings provide a sturdy, low-maintenance solution for patios, carports and pools, and appreciated that the sail is water permeable so it vents heat and avoids ponding during rain.

Key Features

• Woven HDPE fabric: The material blocks up to 95% of harmful UV rays while staying breathable to lower surface temperatures and improve comfort.
• Stainless steel D rings: Heavy duty corner rings attached to white webbing give reliable anchor points that resist corrosion outdoors.
• Water permeable construction: The sail allows water and air to pass through so it does not collect rain and dries quickly after storms.
• Custom size options: Available in a range of custom dimensions so you can measure and order a sail that fits specific patios, carports or pergolas.
• Rectangle styling: A simple rectangular shape integrates easily with existing outdoor designs and provides broad, even shade coverage.
• Multiple uses: With proper hardware a sail can attach to poles, trees, walls or roofs making it versatile for yards, pools and vehicle covers.

Who It's For

The ShadeMart 17' x 20' sail is ideal for homeowners, renters with outdoor space, and small businesses that need a cost-effective shading solution for patios, poolside lounging or carports. Installers who want a durable fabric that breathes and reduces direct sun exposure will value the UPF50 protection and stainless corners.

People who need a fully waterproof canopy should look elsewhere, since this style is designed to be water permeable rather than block rain. Also, buyers who require exact factory-cut fit should measure carefully and consider professional measuring for the custom options available.

Pros & Cons

Pros

• Blocks up to 95% of UV rays and noticeably reduces temperature beneath the sail.
• Durable woven HDPE fabric and stainless steel D rings stand up to wind and sun exposure.
• Water permeable design prevents ponding and aids ventilation during warm or wet weather.
• Easy to integrate with existing structures and available in custom sizes for tailored fit.

Cons

• Not waterproof, so it will not protect against heavy rain or provide a dry area beneath during storms.
• Manual measurement variance means buyers should double-check dimensions before ordering custom sizes.

Specifications

Product Shape	Rectangle
Size	17' x 20'
Material	Woven HDPE (High Density Polyethylene)
UV Protection	UPF50, blocks up to 95% of UV rays
Corners	Stainless steel D rings on heavy duty white webbing
Water Resistance	Water permeable / breathable (not waterproof)
Common Uses	Patio, carport, pergola, pool, yard, window shade

Our Verdict

The ShadeMart 17' x 20' White Sun Shade Sail is a practical, well-built option for anyone wanting reliable sun protection and improved outdoor comfort at a reasonable value. Its woven HDPE and stainless corners deliver durability and ease of installation, and the breathable design prevents ponding. Choose this sail when UV blocking and airflow matter most; choose a waterproof canopy if you need full rain protection.

Frequently Asked Questions

Is this shade sail waterproof?
The fabric is water permeable and breathable, so it will not be waterproof or keep the area beneath fully dry in heavy rain.

Can I attach the sail to trees or poles?
Yes, with the proper hardware kits the sail can be attached to poles, trees, walls or roofs for flexible installation.

Will it fade or deteriorate in sun?
The woven HDPE is designed to resist UV degradation and retain color, but long-term exposure will gradually weather any outdoor fabric.