ShadeMart 12 ft x 17 ft Grey Sun Shade Sail UPF50 Rectangle - Outdoor

In this review of the ShadeMart 12' x 17' grey rectangle shade sail, the bottom line is clear: it is a practical, heavy-duty sun screen for homeowners who want reliable UV protection and better outdoor comfort without a permanent structure. The sail is made from woven HDPE fabric with stainless steel D rings attached to heavy webbing, and it blocks up to 95% of harmful UV rays while remaining water permeable and breathable. For patios, carports and poolside areas where airflow and heat reduction matter most, this shade sail delivers what it promises.

Key Features

• Material: Woven HDPE fabric provides a durable, tear-resistant canopy that stands up to repeated outdoor use.
• UV Protection: Blocks up to 95% of UV rays to significantly lower temperatures and protect people and furnishings from sun damage.
• Corners and attachments: Stainless steel D rings and heavy duty webbing at the corners create secure anchor points and simplify installation.
• Water permeable: Breathable fabric allows water and air to pass through, reducing wind load and pooling compared with solid tarps.
• Custom sizing: Available in multiple sizes and customizable cuts so you can match a specific patio, carport or pergola footprint.
• Style: Rectangle shape and neutral grey color integrate easily with existing outdoor decor while providing functional shade.

Who It's For

This shade sail is aimed at homeowners and renters who want a non-permanent shade solution for patios, carports, poolside seating, pergolas and gardens. It suits people who prioritize UV protection and airflow: the fabric filters sunlight while letting air and water pass, which helps keep spaces cooler without trapping moisture.

It is less suitable for buyers who need full waterproofing or a rigid structure; this style is explicitly not waterproof and relies on correct tensioning and good anchor points to perform well in windy conditions. Those needing exact geometric precision should measure carefully, as manual sizing can produce slight shape variation.

Pros & Cons

Pros

• High UV blockage and noticeable temperature reduction in shaded areas.
• Durable HDPE weave with stainless steel D rings and reinforced webbing for secure anchoring.
• Breathable, water permeable design prevents water pooling and reduces wind load.
• Custom size options allow easier fitting to nonstandard areas.

Cons

• Not waterproof, so it does not keep out heavy rain like a tarp or solid canopy.
• Some customers report size and shape variance; careful measurement is required for critical installs.

Specifications

Brand	ShadeMart
Size	12' x 17' rectangle
Material	Woven HDPE (High Density Polyethylene)
UV Protection	Blocks up to 95% of UV rays (UPF50)
Corners	Stainless steel D rings with heavy duty webbing
Waterproof	No - water permeable and breathable
Primary uses	Patio, carport, pergola, pool, yard, window shade

Our Verdict

The ShadeMart 12' x 17' grey rectangle shade sail is a sensible value for anyone wanting strong sun protection and improved comfort without building a permanent structure. It combines durable HDPE fabric and reinforced corners with a breathable design that reduces heat and resists pooling; just be aware it is not waterproof and accurate measuring matters. For patios, carports and casual outdoor spaces, it is an effective, affordable upgrade.

Frequently Asked Questions

Is this shade sail waterproof?
It is not waterproof; the woven HDPE fabric is water permeable and designed to let water pass through.

How much UV protection does it provide?
The fabric blocks up to 95% of harmful UV rays (UPF50), helping to lower temperatures in shaded areas.

Can it be mounted to walls, poles or trees?
Yes, with the proper hardware kits the reinforced D ring corners allow attachment to poles, trees, walls or roofs.