12ft x 17ft x 20.8ft Right Triangle Sun Shade Sail - UPF50+ Protection

Our review of this custom size right triangle shade sail finds it useful for homeowners and small commercial spaces that need reliable sun protection without a permanent structure. The biggest reason to buy is its combination of 95% sun protection and heavy-duty 200 GSM HDPE fabric, which cuts direct UV exposure and lowers ambient temperature noticeably. Installation is straightforward for anyone comfortable with basic mounting hardware, and customization from D-ring to D-ring makes it a practical option when standard sails won't fit the area.

Key Features

• 95% UV blockage: The 200 GSM HDPE material blocks up to 95% of harmful UV rays for safer outdoor use.
• Temperature reduction: The sail can lower shaded area temperatures by as much as 15 degrees compared with unshaded spots, making patios and seating more comfortable.
• Custom sizing: Measurements are taken from D-ring to D-ring so the sail can be made to fit irregular spaces precisely.
• Durable construction: Reinforced edges, double-layer stitching and stainless steel D-rings improve longevity under routine outdoor use.
• Flexible installation: Can be mounted to trees, roofs, walls or poles with standard mounting hardware and a recommended corner gap for best tension.
• Commercial standard: Built to a higher durability standard with a 3-year assurance for buyer confidence.

Who It's For

This shade sail is best for homeowners, rental property managers and small commercial venues that need a large, tailored shade solution without building a permanent awning. It suits patios, playgrounds, poolside seating and outdoor dining areas where UV protection and cooler temperatures are priorities.

It is less appropriate for buyers who expect a permanent waterproof canopy or for sites with extreme, sustained weather exposure; the fabric is water and air permeable and designed primarily for sun protection rather than complete weatherproofing.

Pros & Cons

Pros

• High sun protection with up to 95% UV blockage for safer outdoor spaces.
• Clearly reduces temperature in shaded areas, improving comfort on hot days.
• Custom D-ring sizing and reinforced construction make for a tailored, sturdy fit.
• Includes stainless steel hardware and a 3-year assurance for added value.

Cons

• Durability feedback is mixed over long term sun exposure, with some customers reporting faster degradation in very harsh conditions.
• Not fully waterproof since the material is air and water permeable, so it will not replace a solid canopy in heavy rain.

Specifications

Shape	Right triangle
Size	12' x 17' x 20.8'
Material	200 GSM HDPE
UV Protection	Up to 95% blockage, UPF50+
Permeability	Water and air permeable
Hardware	Stainless steel D-rings, reinforced edges
Assurance	3 years included

Our Verdict

This custom right triangle shade sail is a sensible buy for anyone needing substantial sun protection and a cooler outdoor space without permanent construction. With 95% UV blockage, robust 200 GSM fabric and customizable sizing it delivers strong value, though buyers in very harsh climates should monitor long-term wear.

Frequently Asked Questions

Is this sail waterproof?
The fabric is water and air permeable, so it will shed some water but is not a fully waterproof canopy intended for heavy rain protection.

How should I measure for a custom fit?
Provide precise measurements from D-ring to D-ring; the maker customizes the sail to those dimensions for the best fit.

How long will it last outdoors?
Construction with reinforced edges and stainless D-rings improves longevity and it includes a 3-year assurance, though lifespan can vary with extreme sun exposure according to some user reports.