ShadeMart 13ft x 18ft Red Rectangle Sun Shade Sail - Breathable UV

In this review the ShadeMart 13' x 18' red rectangle sun shade sail is judged on build, sun protection and everyday usefulness for patios, carports and pool areas; the bottom line is that it is a solid, no-fuss solution for people who want strong, breathable shade without a permanent structure. The sail's woven HDPE fabric and stainless steel corner D rings feel durable, and the design blocks a large portion of UV rays while allowing water and air to pass through, which makes it a practical choice for year-round outdoor coverage.

Key Features

• Woven HDPE fabric: delivers a tough, tear-resistant surface that stands up to sun exposure and repeated tensioning.
• Stainless steel D rings: provide reliable attachment points that resist rust when mounted with proper hardware.
• Water permeable and breathable: lets rain and airflow through so it does not pond water and reduces wind load on the installation.
• High UV protection: blocks up to 95% of harmful UV rays and can lower temperatures under the sail by noticeable degrees.
• Custom sizing available: offers flexibility to order an exact coverage area when standard sizes do not match the venue.
• Rectangle styling: fits commonly shaped areas like patios, carports and pool equipment covers for a clean, integrated look.

Who It's For

The ShadeMart rectangle shade sail is best for homeowners and renters who need affordable, semi-permanent shade over patios, pergolas, carports or pool equipment and want a breathable fabric that will not trap heat or collect water. Installers who want stainless steel D rings and heavy webbing will appreciate the practical mounting points and overall material strength.

It is less suited for buyers looking for a fully waterproof canopy or those who need a rigid, permanent structure; if you require full rain protection or a built-in gazebo, consider a different solution that specifies waterproof material and solid framing.

Pros & Cons

Pros

• Durable woven HDPE resists tearing and stands up well to sun exposure.
• Good value compared with building a permanent roof and simple to install with the right hardware.
• Breathable, water-permeable design reduces heat beneath the sail and prevents pooling.
• Custom size options make it easy to adapt to unique spaces.

Cons

• Not waterproof, so it will not keep areas dry during heavy rain.
• Manual measurements can vary slightly, so careful measuring is required before ordering.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	13 ft x 18 ft
Fabric	Woven HDPE (high density polyethylene)
Corners	Stainless steel D rings with heavy duty white webbing
Functionality	Water permeable, breathable, UV resistant (up to 95% blockage)

Our Verdict

The ShadeMart 13' x 18' red rectangle sun shade sail is a practical, cost-effective choice for anyone who wants durable, breathable sun protection over outdoor living areas. With solid materials, stainless steel corners and good UV blockage it is excellent value for patios, carports and pool equipment areas, provided you do not need a waterproof canopy.

Frequently Asked Questions

Is this shade sail waterproof?
No, the fabric is water permeable and breathable so it will allow rain to pass through rather than shed it.

Can it reduce temperature under the sail?
Yes, the sail blocks a large portion of UV rays and can noticeably lower temperatures beneath it by several degrees.

Can the sail be attached to trees or poles?
Yes, with proper hardware kits it can be mounted to poles, trees, walls or roofs and adapted to a variety of structures.