Sun Shade Sail 17ft x 20ft Rectangle Canopy - High UV Block

In this review the Sun Shade Sail 17' x 20' Rectangle Canopy is judged as a practical, budget-friendly solution for homeowners who want reliable daytime shade without a permanent structure. The biggest reason to buy is its combination of a high-density knitted mesh that blocks up to 95% of UV rays while still allowing cooling breezes and some rain through, making it a useful cover for patios, decks and pergolas that need sun protection but not a waterproof roof.

Key Features

• High UV protection: The knitted high-density polyethylene fabric blocks up to 95% of UV rays, providing strong sun protection for outdoor seating and play areas.
• Breathable mesh: The permeable material lets air flow through to reduce heat buildup while allowing light rain to penetrate so water does not pool on the sail.
• Cutting craftsmanship: The canopy is cut from a complete mesh and finished with double-strength stitched seams for improved durability at stress points.
• Rust-resistant fittings: Each corner features an anti-rust D-ring and the product includes four cords for installation, simplifying attachment to anchors.
• Curved edge design: The curved edges reduce sagging and improve the sail's tension and shading performance when installed correctly.

Who It's For

The sail is ideal for homeowners and renters who need a removable shade solution for a patio, backyard, deck or pergola and who value UV protection and airflow over waterproofing. It suits people who want something that looks tidy and can be installed with basic hardware and ropes.

It is less suitable for those who require a fully waterproof cover or extremely precise sizing for fixed-frame installations, since the fabric length is measured from D-ring to D-ring and can vary by up to 4 ft; custom sizing is available if exact dimensions are critical.

Pros & Cons

Pros

• Effective sun blocking and cooling thanks to a high-density mesh that blocks most UV rays.
• Durable construction with double-stitched seams and anti-rust D-rings in each corner.
• Curved edge design and breathable fabric reduce sagging and interior heat buildup.
• Easy to install with included cords and straightforward mounting guidance.

Cons

• Not waterproof, so it will not keep a covered area dry in steady rain.
• Measured size tolerance from D-ring to D-ring can be as much as 4 ft, so exact fit requires care or custom ordering.

Specifications

Our Verdict

The 17' x 20' rectangle Sun Shade Sail offers strong sun protection, good airflow and durable stitching at a modest price, making it a sensible buy for anyone wanting shade over a patio, deck or pergola without building a permanent structure. It is best for users who accept a permeable, nonwaterproof cover and who will allow installation clearance for anchors or order a custom size if needed.

Frequently Asked Questions

Is this shade sail waterproof?
No. The sail is a permeable knitted mesh designed to allow light rain and breezes through; it is not waterproof.

How much sunlight does it block?
The standard series blocks approximately 90%-95% of sunlight; the white series blocks about 80%-85%.

How should I account for mounting hardware?
Leave about 0.5-1 ft between the fixing point and the shade sail to allow room for hooks, ropes or other mounting hardware; accessories may be purchased separately.