13 ft x 20 ft Sun Shade Sail Rectangle Outdoor Canopy - UV Block

In this review of the 13' x 20' sun shade sail rectangle outdoor canopy, the bottom line is clear: this breathable, high-density polyethylene shade cloth is best for homeowners who need an affordable, UV-blocking cover for a patio, deck or pergola. The single biggest reason to buy is its ability to reduce heat while still allowing some light and airflow; the sail blocks up to 95% of harmful UV rays and is made from a stretchy, tear-resistant knitted fabric that cleans easily with water.

Key Features

• Permeable material: The 100% high-density polyethylene knitted fabric resists tearing and fading while allowing air to pass through so shaded areas stay cooler.
• High UV protection: The shade cloth can block up to 95% of harmful UV rays, protecting skin and reducing surface heat beneath the sail.
• Sturdy construction: Double-stitched edges and D-rings provide stronger attachment points and greater wear resistance for long term use.
• Curved edge design: Curved sides increase pull strength and help prevent drooping, though the center width will be slightly shorter because of the curves.
• Easy maintenance: The fabric is easy to clean with water, making seasonal upkeep straightforward.
• Stretch and sizing note: The fabric stretches, so sizes given are for when the sail is pulled tight and installers should fully extend it or choose a slightly larger size.

Who It's For

The sail is well suited to homeowners and renters who want a cost-effective shade solution for a backyard, porch, pergola, pool area, or carport where airflow is desirable and full waterproofing is not required. It works for DIY installers who can provide secure anchor points and are comfortable allowing about 1.5 ft for mounting hardware.

People who need a rigid, waterproof canopy or who expect heavy, constant abuse from severe weather may need a different product; also shoppers who want perfectly straight edges should request straight-edge options since the default has curved sides that shorten the center span.

Pros & Cons

Pros

• Effective UV blocking up to 95% while still permitting light and air flow.
• Durable-feeling knitted HDPE fabric with double-stitched edges and D-rings for secure installation.
• Simple cleaning with water and generally easy to install for typical outdoor anchor points.
• Curved edges increase tension and reduce droop when installed properly.

Cons

• Fabric stretch means the labeled size applies when pulled tight, and some users may find it too small if not fully extended or if measurements are inconsistent.
• There are reports from some users of tearing after a few months in very rough conditions, so extreme climates may shorten service life.

Specifications

Brand	TANG
Shape	Rectangle
Size (stretched)	13' x 20'
Material	100% high-density polyethylene knitted fabric
UV Block	Up to 95% blockage
Edges	Double-stitched with D-rings
Recommended hardware allowance	Allow 1.5 ft for mounting hardware

Our Verdict

The 13' x 20' rectangle shade sail is a strong value for anyone who needs breathable sun protection and solid UV reduction for patios, decks or poolside areas. When installed fully tensioned and paired with good mounting hardware it delivers effective shade and cool comfort, though buyers in very harsh weather should consider heavier-duty options.

Frequently Asked Questions

Will this sail block sunlight completely?
The sail blocks up to 95% of harmful UV but is permeable, so it reduces heat and sun while still allowing some diffuse light and airflow.

Do I need special hardware to install it?
Standard mounting hardware works, but allow about 1.5 ft extra for anchors and tensioning; the manufacturer recommends their hardware kit for best durability.

How do I size it to avoid tightness issues?
Remember the fabric stretches, so fully extend the sail when installing or choose a slightly larger size if you want extra slack; curved edges add 1"-8" to side length but shorten the center width.