17ft x 20ft Green Sun Shade Sail Rectangle - UPF50 Cooling Canopy

In this review the ShadeMart 17' x 20' Green Sun Shade Sail is evaluated as a practical, heavy-duty rectangle canopy for homeowners and small business owners who need reliable sun protection. The biggest reason to buy is its combination of breathable woven HDPE fabric and sturdy stainless steel D rings, which deliver long-lasting shade and a measurable cooling effect without trapping moisture. The review covers real-world durability, installation notes and where this style works best.

Key Features

• Woven HDPE fabric: The high density polyethylene weave blocks up to 95% of harmful UV rays while remaining water permeable so it reduces heat without collecting rain.
• Stainless steel D rings: Reinforced corner D rings attached to heavy duty white webbing provide secure anchor points that hold tension well over time.
• Breathable, water permeable: The sail allows water and air to pass through, preventing pooling and improving comfort beneath the canopy.
• Cooling performance: The fabric significantly lowers temperatures under the sail, making patios and carports noticeably cooler.
• Custom size options: Available in multiple sizes and custom cuts to fit a variety of outdoor spaces when measured carefully.
• Decorative rectangle shape: The simple rectangular styling integrates easily with existing outdoor design while providing broad coverage.

Who It's For

This shade sail is best for homeowners, renters with flexible mounting points, and small business owners who need a durable, UV-blocking canopy for patios, carports, pergolas or pool areas. It suits anyone who prefers a breathable shade that reduces heat without becoming a waterproof tarp.

People who need a fully waterproof cover or require a highly tensioned architectural installation should look elsewhere, as this style is explicitly water permeable and designed for more straightforward mounting to poles, trees or walls.

Pros & Cons

Pros

• High quality woven HDPE fabric provides excellent UV protection and long-term durability.
• Stainless steel D rings and heavy webbing make attachment straightforward and robust.
• Breathable design prevents water pooling and improves air circulation under the sail.
• Available in custom sizes so it can be tailored to varied outdoor layouts.

Cons

• Not waterproof, so it will not keep an area dry in heavy rain.
• Sizes may vary slightly due to manual measurement and cutting, requiring careful measurement before ordering.

Specifications

Our Verdict

The ShadeMart 17' x 20' Green Sun Shade Sail is a practical, value-oriented choice for anyone who needs broad, breathable sun protection with strong UV blocking and solid hardware. It is especially good for patios, carports and poolside areas where airflow and reduced temperatures matter; avoid it only if you require a waterproof canopy.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is water permeable and designed to allow water and air to pass through rather than repel rain.

Can the sail be custom sized?
Yes. ShadeMart offers custom size options, but accurate measurement is important because manual cutting can produce slight size variations.

Will it withstand strong winds?
Customers report good durability and some have noted it endured high winds when properly installed, but secure mounting and the right hardware are essential.