17ft x 21ft Gray Straight Edge Sun Shade Sail - Durable UV Block

In this review we look at the 17' x 21' Gray Straight Edge Sun Shade Sail and why it is a solid choice for homeowners who need broad, reliable shade. The bottom line: this shade sail is best for patios, pergolas, and backyard areas where a durable, breathable cover is needed, because the 190 GSM HDPE fabric blocks up to 96% of UV rays while still allowing cooling breezes to pass through. The construction and corner hardware mean it stands up to regular outdoor use and fits a variety of mounting layouts when trimmed with the recommended tension.

Key Features

• Material: Constructed from 190 GSM UV-protected high density polyethylene for durable, long-lasting shade and resistance to sun degradation.
• UV Protection: Blocks up to 96% of harmful UV rays, reducing sun exposure and lowering temperature beneath the sail.
• Straight Edge Design: The rectangular shape and straight edges provide predictable coverage for pergolas, patios, windows, doorways, and playgrounds.
• Hardware: Heavy stitched seams and 304 stainless steel D-rings at each corner give secure anchor points and improve longevity under tension.
• Breathable Fabric: The permeable weave lets air and water pass through to avoid pooling and maintain a cooling breeze under the sail.
• Custom Options: Hand-made in the US with custom sizes and colors available, plus a one-year warranty for normal weather and usage.

Who It's For

This sun shade sail is ideal for homeowners and renters who want substantial shade for a patio, pergola, sandbox, or driveway, and who prefer a breathable cover that reduces heat without completely blocking airflow. It works well for gardeners and family areas where UV protection and durability matter, and for people who can install or arrange professional installation using the listed mounting measurements and optional hardware.

Those who should look elsewhere include buyers needing a fully waterproof awning (the fabric is permeable) or customers expecting a complete mounting kit with poles included, since customers note poles are not supplied and additional hardware may be required for some designs.

Pros & Cons

Pros

• High-density 190 GSM HDPE with UV-stabilized treatment provides robust UV blockage and long service life.
• 304 stainless steel D-rings and reinforced seams make installation secure and improve durability under tension.
• Permeable design allows airflow and water drainage, preventing sagging and creating a cooler shaded space.

Cons

• Does not include poles or comprehensive mounting hardware, so extra purchases may be necessary for some installations.
• The fabric is permeable so it will not keep all rain out if a waterproof cover is required.

Specifications

Size	17 ft x 21 ft (measurement D-ring to D-ring)
Color	Gray
Material	190 GSM UV-protected high density polyethylene (virgin HDPE)
UV Blockage	Up to 96% UV rays blocked
Hardware	304 stainless steel D-rings with triple layer webbing
Permeability	Breathable fabric allows air and water to pass through
Warranty	One-year warranty under normal weather and usage

Our Verdict

The 17' x 21' Gray Straight Edge Sun Shade Sail is a practical, well-built option for anyone wanting large, breathable shade that significantly reduces UV exposure. It offers strong construction, reliable D-ring anchors, and customizable sizing, making it good value for patios, pergolas, and family play spaces - provided you are prepared to supply or purchase any additional mounting hardware.

Frequently Asked Questions

How is the sail measured?
The measurement is from D-ring to D-ring, and the sail should be about 0.5 ft to 2 ft shorter than the distance between mounting points without extensions.

Will it block rain?
The fabric is permeable to let water and air pass through, so it reduces sun and some spray but is not fully waterproof.

Does it come with installation hardware?
Ropes are included for convenience, but poles and full mounting kits are not supplied and may need to be purchased separately depending on your design.