ShadeMart 17ft x 20ft Grey Sun Shade Sail Rectangle - UPF50 Protection

In this review of the ShadeMart 17' x 20' grey sun shade sail, the bottom line is simple: it is a heavy-duty, breathable rectangle canopy best suited to homeowners and small businesses who want reliable UV protection and airflow without trapping water. The reviewer found the woven HDPE fabric and stainless steel corner D rings deliver solid durability and easy anchoring, while the sail's water permeable design and UPF50 rating provide meaningful shade and cooler outdoor temperatures. This is a practical choice when shade, longevity, and versatility matter more than total waterproofing.

Key Features

• Woven HDPE fabric: The heavy density polyethylene weave gives the sail strength and a textured finish that resists tearing under normal outdoor use.
• Stainless steel D rings: Reinforced corner D rings attached to heavy duty webbing make mounting secure and compatible with a range of hardware kits.
• Water permeable and breathable: The fabric allows water and air to pass through, preventing water pooling and improving ventilation underneath the sail.
• UPF50 sun protection: Blocks up to 95% of harmful UV rays and can lower perceived temperature in the shaded area by roughly 10 to 15 degrees.
• Custom sizing available: A variety of custom sizes lets you match the sail to patios, carports, pergolas, and other structures when standard sizes are not ideal.
• Decorative rectangle styling: The simple rectangular shape integrates with many outdoor designs while providing broad coverage for seating or parking areas.

Who It's For

This shade sail is a good fit for homeowners, renters with attachment points, and small property owners who need a durable, breathable canopy to cool patios, decks, pergolas, or carports without creating standing water. It suits anyone prioritizing UV protection and airflow and who can install anchors to trees, poles, or walls.

People who need complete waterproofing or enclosed rain protection should look elsewhere, since this style is explicitly water permeable rather than waterproof. Also measure your site carefully before ordering a custom size, as customers report variations from manual measurement.

Pros & Cons

Pros

• High quality woven HDPE fabric offers strength and long-term durability.
• Stainless steel D rings with heavy webbing make installation secure and compatible with common hardware kits.
• UPF50 rating provides substantial UV blocking and noticeably cooler shaded areas.
• Allows water and air to pass through, preventing pooling and improving comfort on warm days.

Cons

• Not waterproof, so it will not keep an area dry in heavy rain.
• Customers report occasional size discrepancies from manual measurements, so accurate measuring is important.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	17' x 20'
Material	Woven HDPE (High Density Polyethylene)
Corner fittings	Stainless steel D rings with heavy duty webbing
Functionality	Water permeable, breathable, UPF50 UV protection
Custom options	Custom sizes available; measure venue before purchase

Our Verdict

The ShadeMart 17' x 20' grey rectangle shade sail is a practical, well-made canopy that delivers strong UV protection, durability, and breathability at a reasonable value. It is recommended for anyone who needs reliable shading for patios, carports, or gardens and who accepts that the sail is water permeable rather than waterproof. With sturdy D rings and a robust HDPE weave, it performs well for most outdoor shading needs.

Frequently Asked Questions

Is this sail waterproof?
No, this style is water permeable and designed to allow water to pass through rather than keep an area completely dry.

Will it block UV rays?
Yes, the fabric is rated UPF50 and can block up to 95% of harmful UV rays to reduce sun exposure and lower ambient temperature below the canopy.

Can it be attached to trees or poles?
Yes, with proper hardware kits the reinforced D rings and webbing allow attachment to poles, trees, walls, or roofs for flexible installation.