21ft x 21ft x 29.7ft Right Triangle Sun Shade Sail - 95% UV Protection

Our review of this custom-size right triangle shade sail finds it best for homeowners, small commercial patios, and hobby animal shelters that need robust sun protection without a permanent structure. The single biggest reason to buy is its reliable 95% UV blockage from 200 GSM HDPE fabric that both cools covered areas and stands up to seasonal sun and wind. Installation is straightforward for anyone comfortable with basic mounting hardware, and the customizable D-ring to D-ring sizing lets buyers get a precise fit for awkward corners.

Key Features

• 95% UV Protection: The 200 GSM HDPE material blocks up to 95% of harmful UV rays to protect people, pets, and furnishings.
• Temperature Reduction: The shade sail can lower ambient temperatures by up to 15 degrees compared to unshaded areas for a noticeably cooler space.
• Custom Fit: Measurements are taken D-ring to D-ring so the canopy can be ordered to fit nonstandard layouts and awkward corners.
• Durable Construction: Stainless steel D-rings, reinforced edges, and double-layer stitching increase longevity and resist fraying in routine outdoor conditions.
• Breathable and Water Permeable: The woven HDPE fabric sheds some water and allows air flow, reducing heat buildup beneath the sail.
• Three-Year Assurance: The product comes with a three-year assurance that covers expected durability concerns under normal use.

Who It's For

This shade sail is ideal for homeowners who want a tailored shade solution for patios, decks, poolside seating, or over small garden spaces, and for small businesses seeking a nonpermanent canopy for outdoor customer areas. It also suits backyard poultry keepers or hobbyists who need a shaded run that reduces heat stress.

Shoppers who need a fully waterproof awning or a rigid permanent roof should look elsewhere, and those who require a very large single solid canopy may want to consider multiple sails or different materials, since this design emphasizes sun protection and airflow rather than total water exclusion.

Pros & Cons

Pros

• High UV blockage from 200 GSM HDPE delivers strong sun protection and cooler shade.
• Custom sizing between D-rings allows a tailored fit for odd-shaped areas.
• Stainless steel D-rings and reinforced stitching contribute to noticeable durability and value.
• Breathable fabric reduces heat buildup while allowing water to pass through moderately.

Cons

• Some customers report the supplied size feels small for their expectations, so careful measurement is essential.
• Not intended as a fully waterproof or rigid permanent structure, which limits use in heavy rain.

Specifications

Shape	Right triangle
Size	21ft x 21ft x 29.7ft (custom made)
Material	200 GSM HDPE
UV Blockage	Up to 95%
Hardware	Stainless steel D-rings, reinforced edges
Permeability	Water and air permeable
Warranty	3-year assurance

Our Verdict

This custom right triangle shade sail is a practical, cost-effective way to add high-level sun protection and cooler outdoor space where a permanent structure is not wanted. Buyers who measure carefully and expect airflow rather than waterproof coverage will find good value in the durable materials, reinforced hardware, and the three-year assurance.

Frequently Asked Questions

How should I measure for a custom sail?
Measure D-ring to D-ring for each side and allow recommended installation gaps so the sail can be tensioned properly.

Is this sail waterproof?
The HDPE fabric is water and air permeable, so it sheds some water but is not designed as a fully waterproof roof.

Can it be installed on trees and walls?
Yes; the sail is suitable for attachment to trees, roofs, walls, or posts using appropriate mounting hardware and spacing at corners.