17ft x 21ft x 27ft Right Triangle Sun Shade Sail - 95% UV Blockage

In this review of the 17' x 21' x 27' right triangle sun shade sail, the bottom line is simple: it is for anyone needing heavy-duty UV protection on a custom scale and who wants a cooler, durable outdoor cover. The sail's strongest claim is consistent 95% sun blockage from its 200 GSM HDPE fabric, which makes it an easy recommendation for patios, play areas, chicken runs or commercial shading where sun protection matters most rather than full waterproofing.

Key Features

• 95% UV protection: The 200 GSM HDPE fabric blocks up to 95% of harmful rays, helping protect people and items beneath the sail.
• Temperature reduction: The shade lowers ambient temperatures by as much as 15 degrees versus unshaded areas, creating a noticeably cooler spot on hot days.
• Custom sizing: The sail is made to order from D-ring to D-ring so it can be tailored to odd-shaped or specific outdoor spaces for a better fit.
• Durable construction: Reinforced edges, double-layer stitching and stainless steel D-rings improve longevity and resist fraying under regular use.
• Air and water permeable: The weave allows airflow and some water passage so it reduces wind loading and drainage issues compared with solid canopies.
• Easy installation guidance: The product includes clear placement advice such as leaving at least 0.5 ft gap at corners for best tensioning and performance.

Who It's For

This shade sail suits homeowners, small businesses and hobby farmers who need reliable sun protection over patios, playgrounds, seating areas or animal enclosures and want a tailored fit. It works particularly well where heat reduction and UV blocking are primary goals and where a breathable, non-waterproof solution is acceptable.

It is less suitable for buyers seeking a fully waterproof awning or rigid shelter, or for those who prefer pre-sized, off-the-shelf pieces only; customers should carefully measure corner-to-corner D-ring distances before ordering to avoid size surprises.

Pros & Cons

Pros

• High sun protection from the 200 GSM HDPE fabric that blocks up to 95% of UV rays.
• Built to last with reinforced edges, double stitching and stainless steel D-rings for commercial-grade durability.
• Customizable sizing ensures a tailored fit for unusual or specific layouts.
• Permeable weave reduces heat and wind load while allowing drainage.

Cons

• Not fully waterproof, so it will not replace a solid canopy in heavy rain.
• Some customers have found sizing smaller than expected, so precise measurement is critical.

Specifications

Shape	Right triangle
Size (D-ring to D-ring)	17' x 21' x 27'
Material	200 GSM HDPE
UV blockage	Up to 95%
Water permeability	Water & air permeable (not waterproof)
Hardware	Stainless steel D-rings, reinforced edges
Warranty	3 year assurance

Our Verdict

The 17' x 21' x 27' right triangle shade sail is a practical, value-minded choice for anyone who needs strong sun protection and cooler outdoor spaces without a rigid structure. Its 95% UV blockage, durable stitching and customizable sizing make it a smart buy for patios, play areas and animal covers, provided buyers confirm precise D-ring measurements and accept that it is not a waterproof canopy.

Frequently Asked Questions

Is this shade sail waterproof?
Answer. No, it is water and air permeable by design; it reduces sun and heat but is not intended as a fully waterproof roof.

How should I measure for a custom sail?
Answer. Measure from D-ring to D-ring for each side and allow the recommended corner gap of at least 0.5 ft; reduce side lengths by 1 to 1.5 ft if tensioning to nearby poles.

How durable is the construction?
Answer. It uses 200 GSM HDPE fabric with reinforced edges, double-layer stitching and stainless steel D-rings, and the product comes with a 3 year assurance.