ShadeMart 18ft x 20ft Beige Sun Shade Sail UPF50 Rectangle

In this review of the ShadeMart 18' x 20' beige sun shade sail, the bottom line is simple: it is a robust, breathable canopy for anyone wanting reliable sun protection and airflow over a patio, carport, or pool area. The sail stands out primarily for its woven HDPE fabric that blocks up to 95% of UV rays while remaining water and air permeable, so it cools outdoor spaces without trapping heat. Installation is straightforward with the stainless steel D rings and heavy webbing, making it a practical choice for homeowners who want shade that lasts.

Key Features

• Woven HDPE material: provides high UV protection and durability while allowing air to circulate to keep the shaded area cooler.
• Stainless steel corner D rings: are attached to heavy duty webbing for secure anchoring and reliable load points during typical wind conditions.
• Water and air permeable: the fabric lets water pass through so rain drains rather than pooling, reducing stress on mounting points.
• Blocks up to 95% UV: significantly lowers sunlight exposure and can reduce temperatures beneath the sail by 10-15 degrees.
• Custom size options: ShadeMart offers custom dimensions so buyers can match the sail to patios, pergolas, or irregular spaces when measured accurately.
• Rectangle styling: a simple geometric look that integrates with many outdoor layouts and comes in multiple colors to suit decor.

Who It's For

This shade sail is best for homeowners and renters who want a durable, ventilated canopy for patios, carports, decks, poolside areas, or yards. It works particularly well where airflow and UV protection are priorities and where a semi-permanent fabric solution with strong anchor points is needed.

It is less suitable for buyers seeking a fully waterproof cover or those who need rigid roofing; since this style is not waterproof, people who require complete rain protection should consider a different product designed for waterproof coverage.

Pros & Cons

Pros

• High UV blocking performance that noticeably cools shaded areas.
• Durable woven HDPE construction and stainless steel D rings for long-term use.
• Breathable, water permeable fabric prevents pooling and reduces wind stress.
• Available in custom sizes to fit many outdoor configurations.

Cons

• Not waterproof, so it will not keep an area dry during heavy rain.
• Manual measurement can lead to slight sizing variations, so careful measuring is required.

Specifications

Brand	ShadeMart
Size	18' x 20'
Shape	Rectangle
Material	Woven HDPE (High Density Polyethylene)
Corner Hardware	Stainless steel D rings with heavy white webbing
Functionality	Water and air permeable; UV resistant UPF50
Use Cases	Patio, carport, pergola, pool, yard, window shade

Our Verdict

The ShadeMart 18' x 20' rectangle shade sail is a solid value for anyone needing effective UV protection with good airflow and durable attachment points. It is especially worthwhile for outdoor living areas where cooling and sun blocking matter more than waterproofing, and the option for custom sizes makes it versatile for many installations.

Frequently Asked Questions

Is this shade sail waterproof?
No. This style is water permeable and designed to let water pass through rather than provide waterproof coverage.

How much UV protection does it provide?
The fabric blocks up to 95% of harmful UV rays, offering significant sun protection beneath the sail.

Can it be attached to trees or poles?
Yes. With proper hardware kits the sail can be anchored to poles, trees, walls, or roofs for many outdoor applications.