ShadeMart 17ft x 17ft Grey Sun Shade Sail UPF50 Square - Cool, Durable

In this review of the ShadeMart 17' x 17' grey sun shade sail, the bottom line is simple: this square UPF50 canopy is for homeowners and small businesses who want reliable sun protection and airflow without trapping heat. The reviewer found the woven HDPE fabric and stainless steel corner D rings create a sturdy, low-maintenance canopy that blocks up to 95% of UV while remaining water permeable and breathable. It is best when used over a patio, carport or pool area where temperature reduction and long-term durability matter more than full waterproofing.

Key Features

• Material: Woven HDPE fabric provides a durable, tear-resistant surface that stands up to sun exposure and repeated use.
• UV Protection: Rated to block up to 95% of harmful UV rays, the sail significantly reduces direct sunlight and lowers ambient temperatures by 10 to 15 degrees in shaded areas.
• Breathability: The water permeable design allows rain and air to pass through, preventing pooled water and keeping the shaded area cooler than a waterproof cover.
• Hardware: Stainless steel corner D rings attached to heavy duty white webbing give secure anchor points for mounting to poles, walls or trees.
• Custom Sizing: A range of custom sizes is available so buyers can match the sail to patios, pergolas or carports when they measure their space accurately.
• Style: The clean rectangle shape and neutral grey color integrate with many outdoor decors while serving as a functional canopy.

Who It's For

This shade sail is aimed at homeowners, renters with outdoor space, and small commercial sites that need sun protection over patios, pools, carports or outdoor seating. It particularly suits buyers who value heat reduction and UV defense without wanting a fully waterproof canopy.

It is not ideal for those who need a taut waterproof cover for heavy storms or for installations where exact factory-cut geometry is required; some customers noted size variation and that a sail may not read as a perfectly straight rectangle after installation.

Pros & Cons

Pros

• High UV blocking performance and measurable temperature reduction in shaded areas.
• Durable woven HDPE fabric with stainless steel D rings and heavy webbing for secure mounting.
• Breathable, water permeable weave prevents water pooling and allows airflow under the canopy.
• Custom size options and neutral styling that fits many outdoor settings.

Cons

• Not waterproof, so it will not provide complete rain protection in downpours.
• Some buyers report size or shape variation from manual measurements; careful measuring is required.

Specifications

Brand	ShadeMart
Size	17' x 17' (square)
Material	Woven HDPE (High Density Polyethylene)
UV Protection	Blocks up to 95% of UV rays (UPF50)
Water Resistance	Water permeable / not waterproof
Hardware	Stainless steel D rings with heavy duty white webbing
Uses	Patio, carport, pergola, pool, yard, window shade

Our Verdict

The ShadeMart 17' x 17' grey sun shade sail is a solid choice for anyone who needs effective sun and UV protection with breathability and long-term durability. It delivers reliable heat reduction and sturdy mounting hardware for patios and carports, making it a good value for outdoor shading where waterproofing is not required.

Frequently Asked Questions

Is this shade sail waterproof?
The fabric is water permeable and breathable, so it is not waterproof and will allow rain to pass through.

Will it block harmful sun rays?
Yes, the woven HDPE fabric blocks up to 95% of UV rays and is rated UPF50 for sun protection.

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