Custom Size 11ft x 21ft White Rectangle Shade Sail - UPF50+ Protection

Our review of the Custom Size 11' x 21' White Rectangle Shade Sail finds it best for homeowners and small businesses that need durable, adjustable sun protection without a permanent structure. The single biggest reason to buy is reliable sun blockage: the HDPE fabric blocks up to 95% of UV rays while remaining water and air permeable, so it cuts heat and resists wind pressure better than solid canopies. Installation is straightforward for anyone willing to measure from D-ring to D-ring and plan anchor points, and the sail's reinforced edges and stainless D-rings give confidence for season-long use.

Key Features

• 95% UV blockage: The 200 GSM HDPE fabric blocks up to 95% of harmful UV rays, providing strong sun protection for patios and play areas.
• Temperature reduction: The sail reduces ambient temperature by up to 15 degrees versus unshaded areas, making outdoor time noticeably more comfortable.
• Water and air permeable: The breathable weave sheds wind load and allows water to pass through rather than pooling, reducing stress on attachment points.
• Custom fit: The product is made to order from D-ring to D-ring so the sail can be tailored to a specific 11' x 21' rectangle layout or other custom shapes.
• Heavy duty build: Reinforced edges, double-layer stitching and stainless steel D-rings improve longevity and resist fraying over time.
• Three-year assurance: The included three-year assurance provides added peace of mind for light commercial or residential use.

Who It's For

This shade sail is ideal for homeowners, renters with outdoor space, and small commercial venues seeking an adjustable canopy that cuts UV exposure and lowers surface temperatures. It suits patios, playgrounds, poolside areas, and outdoor dining spaces where a removable, breathable cover is preferred over rigid structures.

Those who want a permanent, fully waterproof roof or precise architectural lines should look elsewhere; the fabric is water permeable and designed to breathe rather than act as a rainproof awning. Installers should be comfortable taking accurate D-ring-to-D-ring measurements and providing strong anchor points.

Pros & Cons

Pros

• High sun protection with up to 95% UV blockage for safer outdoor use.
• Noticeable temperature reduction, often reported around 10-15 degrees in shaded areas.
• Durable construction: stainless D-rings, reinforced edges and double stitching for long life.
• Custom sizing and shape flexibility to fit nonstandard spaces.

Cons

• Not fully waterproof-designed to be water and air permeable rather than a rainproof canopy.
• Requires careful measuring and proper anchor spacing to achieve the best fit and tension.

Specifications

Brand	Amgo
Material	200 GSM HDPE
Sun protection	Up to 95% UV blockage (UPF50+)
Size	Custom 11' x 21' rectangle (made to order)
Edge & hardware	Reinforced edges with stainless steel D-rings
Performance	Water & air permeable; reduces temperature up to 15 degrees
Assurance	3-year assurance included

Our Verdict

The 11' x 21' white rectangle shade sail is a smart, cost-effective solution for anyone wanting strong UV protection and cooler outdoor spaces without permanent construction. Its heavy-duty 200 GSM fabric and reinforced hardware make it a durable choice for residential and light commercial use, and the custom sizing option ensures a better fit than off-the-shelf covers. Choose this sail if you prioritize sun safety, airflow, and longevity over full rainproofing.

Frequently Asked Questions

Is this shade sail waterproof?
Answer. No, the fabric is water and air permeable by design, so it allows water to pass through rather than acting as a waterproof roof.

How should I measure for a custom sail?
Answer. Measure from D-ring to D-ring at the anchor points you plan to use; allow at least 0.5 ft gap per corner to poles or reduce by 1 to 1.5 ft per side if needed for tension.

Will it stand up to high winds?
Answer. The reinforced edges and stainless D-rings improve wind resistance, and customers report strong performance in high winds when properly installed with solid anchor points.