ShadeMart 6 ft x 21 ft Black Rectangle Sun Shade Sail - Breathable UV

Our review of the ShadeMart 6 ft x 21 ft Black Rectangle Sun Shade Sail finds it best suited for homeowners and DIY installers who need a heavy duty, breathable canopy for patios, carports or pool equipment areas. The single biggest reason to buy is its effective sun protection: the woven HDPE fabric blocks up to 95% of harmful UV rays while remaining water permeable and breathable, so it reduces heat without trapping rain or causing ponding. Installation requires basic hardware but the strong stainless steel corner D rings and reinforced webbing make it straightforward for a weekend project.

Key Features

• Material: Woven HDPE fabric provides durable shade that resists tearing and maintains airflow.
• UV Protection: Blocks up to 95% of sunlight to noticeably lower temperatures under the canopy.
• Corner Hardware: Stainless steel D rings sewn into heavy duty white webbing deliver secure anchor points for mounting.
• Water Permeable: Fabric allows water and air to pass through so the sail does not pond and dries quickly after rain.
• Custom Sizes: Available in a wide range of custom dimensions so you can get a closer fit for patios and carports.
• Styling: Rectangle shape and multiple colors let the sail integrate with existing outdoor decor while adding functional shade.

Who It's For

This shade sail is ideal for homeowners who want an affordable way to cut sun exposure and lower temperatures over seating areas, pools, or equipment without building permanent structures. It suits DIY installers who can measure anchor points carefully and use the proper hardware kits to attach to poles, trees, walls or roofs.

It is not for buyers who need a fully waterproof canopy or a ready-made framed structure; if you require complete rain protection or a permanent roof replacement, a rigid shelter or waterproof awning would be a better choice.

Pros & Cons

Pros

• High UV blockage and clear temperature reduction under the sail.
• Strong construction with reinforced webbing and stainless steel D rings for secure mounting.
• Breathable, water permeable fabric prevents water pooling and improves airflow.
• Custom sizing and multiple color options make it adaptable to many outdoor layouts.

Cons

• Not waterproof, so it will not keep an area dry in steady rain.
• Accurate measuring and separate hardware are required for a proper installation.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	6 ft x 21 ft
Material	Woven HDPE (High Density Polyethylene)
Corner Hardware	Stainless steel D rings on heavy duty white webbing
Functionality	Water permeable, breathable, UV resistant

Our Verdict

The ShadeMart 6 ft x 21 ft rectangle shade sail is a practical, cost effective choice for anyone wanting strong UV protection and better airflow for patios, carports or pool areas. Its durable HDPE fabric and reinforced corners make installation reliable for DIY users, and the breathable design avoids ponding. Choose this sail if you need a flexible shade solution and do not require full waterproofing.

Frequently Asked Questions

Is this shade sail waterproof?
The fabric is water permeable and not waterproof, so it will allow rain to pass through rather than keep an area dry.

Can I customize the size?
Yes, ShadeMart offers a large selection of custom sizes; measure your venue accurately before ordering.

What hardware is needed to install?
You will need appropriate anchor hardware and mounting points such as poles, wall anchors or tree straps; the sail includes stainless steel D rings attached to heavy duty webbing.