11ft x 17ft x 20.2ft Red Right Triangle Sun Shade Sail - UPF50

Our review of this red right triangle sun shade sail finds it best for homeowners and small businesses who need a customizable, high-coverage canopy that prioritizes sun protection and airflow. The single biggest reason to buy is its combination of a dense 200 GSM HDPE weave and commercial-grade reinforcement that blocks up to 95% of UV while remaining water and air permeable, so shaded areas stay cooler without trapping heat. Installation is flexible enough for gardens, patios, and play areas where a tailored fit is useful.

Key Features

• 95% Sun Protection: The 200 GSM HDPE fabric blocks up to 95% of harmful UV rays to reduce sun exposure for people and furniture underneath.
• Temperature Reduction: The weave cuts ambient temperatures by as much as 15 degrees versus unshaded spots, making outdoor areas noticeably cooler.
• Water & Air Permeable: The material sheds some water and allows airflow to prevent heat buildup and reduce wind stress on the canopy.
• Custom Size Fit: Measurements are taken from D-ring to D-ring so the sail can be made to match irregular areas and achieve a snug fit.
• Commercial-Grade Durability: Reinforced edges, stainless steel D-rings, and double-layer stitching improve long-term strength and tear resistance.
• Installation Flexibility: Can be attached to trees, roofs, walls, or posts using common mounting hardware and a recommended corner gap for best tension.

Who It's For

This shade sail suits homeowners, schools, cafes, and landscapers who want a tailored shade solution with strong sun protection and breathable performance. It works well over patios, play areas, poolside seating, and outdoor dining spaces where a triangular shape fits the existing structures.

Those needing a permanent waterproof awning or who prioritize a fully sealed canopy in heavy downpours should look elsewhere, since the fabric is water permeable and intended to ventilate rather than act as a rain roof. Also, buyers wanting a rigid frame structure will need a different product.

Pros & Cons

Pros

• High UV blockage from the 200 GSM HDPE, giving reliable sun protection for people and furnishings.
• Noticeable temperature reduction under the sail, improving comfort during hot weather.
• Sturdy construction with stainless D-rings and reinforced edges for better longevity.
• Custom sizing options let you get a precise fit from D-ring to D-ring for odd-shaped spaces.

Cons

• Mixed longevity reports suggest intense sun exposure may reduce lifespan for some installs compared with sheltered use.
• Permeable fabric means it is not a full rainproof canopy in heavy storms.

Specifications

Product shape	Right triangle
Size	11' x 17' x 20.2'
Material	200 GSM HDPE
UV blockage	Up to 95% (UPF50+)
Permeability	Water and air permeable
Hardware	Stainless steel D-rings, reinforced edges
Warranty/assurance	3 years assurance included

Our Verdict

The red right triangle shade sail offers strong value for anyone who needs a ventilated, high-UV-blocking canopy that can be made to fit odd spaces. Its reinforced construction and customizable sizing make it a practical choice for patios, cafes, and play areas; just expect a permeable fabric that is designed to ventilate rather than act as a waterproof roof, and monitor long-term exposure if installed in very harsh sun.

Frequently Asked Questions

Can this sail be cut to fit a specific corner?
Answer: The sail is made to order from D-ring to D-ring for a precise fit, and the seller offers customization options for straight edges if requested.

Will it block rain during a storm?
Answer: The fabric is water permeable and will not provide full waterproofing in heavy downpours; it is intended to reduce sun and heat while allowing airflow.

How should corners be spaced for best tension?
Answer: For optimal performance leave at least 0.5 ft gap between D-rings and poles, or reduce by 1 to 1.5 ft per side when adjusting tension during installation.