17 ft x 20 ft Sun Shade Sail Canopy - Breathable UV Block

In this review the 17' x 20' sun shade sail canopy is assessed as a practical, budget-friendly shelter for patios, decks and carports where sun protection and airflow matter most. The single biggest reason to buy is its combination of a dense 185 GSM HDPE weave that blocks up to 95% of UV while remaining breathable, so it cools a space without trapping heat. The sail is straightforward to install on existing posts, trees or walls and the reinforced corners and stainless D-rings give confidence that it will hold up through regular outdoor use.

Key Features

• 185 GSM HDPE fabric: Provides strong sun protection and a slightly lustrous finish that sheds light while remaining durable for outdoor exposure.
• 95% UV block: Reduces harmful UV rays and direct sun exposure while letting air and some light through for a comfortable shaded area.
• Reinforced hems and stitching: Double-layered seams prevent fraying and help the sail keep its shape over time under tension.
• Stainless steel D-rings: Heavy stitching at each corner secures the D-rings for reliable mounting and easier hanging with rope or hardware.
• Permeable design: Breathable fabric allows water to pass, preventing water pooling on rainy days and improving ventilation beneath the canopy.
• Included ropes: Comes with sturdy polyethylene ropes to simplify the setup process and attach the sail to fixed points.

Who It's For

This shade sail is aimed at homeowners and renters who want an economical way to add shade to a patio, pergola, poolside or carport without enclosing the area. Its breathable HDPE makes it well suited for hot climates where ventilation matters and for spaces with trees or posts already in place for anchoring.

It may be less suitable for buyers who need a perfectly fitted custom shade or precise sizing, since several users report sizing can be tricky and you should allow 0.5-1.5 ft for hardware and attachment. Also, if complete waterproofing or a solid blackout canopy is required, this permeable sail is not designed for that purpose.

Pros & Cons

Pros

• Effective sun protection with a fabric that blocks up to 95% of UV while staying breathable.
• Durable construction with double-stitched edges and sturdy stainless D-rings for secure mounting.
• Permeable material that drains water and reduces pooling after rain.
• Includes installation ropes to get the sail up quickly on standard anchor points.

Cons

• Reported sizing issues mean buyers should measure carefully and allow the recommended extra allowance for hardware.
• Not a fully waterproof or blackout cover, so it will not protect against heavy sideways rain or provide complete darkness.

Specifications

Size measured D-ring to D-ring	17' x 20'
Material	185 GSM 100% non-recycled HDPE
UV protection	Blocks 95% UV light
Edges	Double-layered reinforced stitched seams
Corner fittings	Stainless steel D-rings with heavy stitching
Included accessories	Polyethylene ropes for installation
Water handling	Permeable fabric that allows drainage

Our Verdict

The 17' x 20' sun shade sail is a solid, cost-effective option for shading outdoor living areas where airflow and UV protection matter. It delivers durable construction and reliable sun blocking for patios, decks and carports, making it good value for gardeners and homeowners who want shade without trapping heat. Measure carefully and plan anchors to avoid sizing frustrations, but for its price and building quality it is an easy recommendation for most non-waterproof shade needs.

Frequently Asked Questions

Will this sail block most of the sun?
The fabric blocks about 95% of UV light while still allowing air and some light to pass through.

Does the sail pool water in rain?
No, the permeable HDPE fabric allows water to pass through so it generally drains rather than pooling.

How much extra space is needed for installation?
Leave about 0.5-1.5 ft between the fixed point and the sail D-ring to allow for hardware, hooks or ropes when mounting.