Custom Size 11ft x 21ft Black Rectangle Sun Shade Sail - UPF50+ Canopy

Our review of the custom size 11' x 21' black rectangle sun shade sail finds it best suited to homeowners or small businesses who need a rugged, tailored canopy for patios, play areas, or outdoor dining. The single biggest reason to buy is the combination of heavy-duty 200 GSM HDPE fabric with reinforced stainless steel D-rings that delivers reliable 95% sun protection while remaining water and air permeable, so it cools a space without trapping moisture.

Key Features

• 95% UV blockage: The 200 GSM HDPE material blocks up to 95% of harmful UV rays, providing strong sun protection for people and furnishings beneath the sail.
• Temperature reduction: The canopy can lower ambient temperatures by up to 15 degrees compared with unshaded areas, making outdoor spaces noticeably cooler.
• Custom sizing: Measured D-ring to D-ring for a tailored fit, the sail is made to order so it fits odd or specific spaces better than off-the-shelf options.
• Durable hardware: Stainless steel D-rings and reinforced edges with double-layer stitching resist fraying and enhance longevity in commercial-standard use.
• Breathable and water permeable: The fabric sheds some water and lets air pass through, reducing wind load and preventing a soggy canopy after light rain.
• Flexible installation: Can be attached to trees, walls, roofs, or poles; guidance recommends a small gap at corners for optimal tension and performance.

Who It's For

This shade sail is ideal for homeowners, daycare operators, cafes, or small commercial venues that need a tailored canopy that performs in wind and sun. Customers who value strong material quality and a made-to-measure fit will appreciate the durable 200 GSM HDPE fabric, reinforced stitching, and stainless steel D-rings.

It is less appropriate for someone who wants a temporary, low-cost sunshade or a fully waterproof awning; the fabric is water and air permeable rather than watertight. Also, buyers who prefer a rigid framed structure or instant pop-up shade should look at different product types.

Pros & Cons

Pros

• High UV protection blocks about 95% of sun exposure for safer outdoor use.
• Custom sizing from D-ring to D-ring lets the sail fit irregular spaces with a neat appearance.
• Commercial-grade durability with stainless steel D-rings and double-layer stitching increases longevity.
• Permeable fabric reduces heat and wind load while avoiding trapped moisture buildup.

Cons

• Not fully waterproof, so it will not provide complete protection in heavy rain.
• Installation requires careful measurement and appropriate anchoring hardware, which may need planning for some users.

Specifications

Brand	Amgo
Material	200 GSM HDPE
UV Blockage	95%
Size (example)	11' x 21' custom rectangle
Hardware	Stainless steel D-rings, reinforced edges
Permeability	Water and air permeable
Assurance	3 years

Our Verdict

For anyone needing a durable, made-to-measure shade solution that prioritizes sun protection and airflow, this custom 11' x 21' rectangle sail is a smart buy. Its heavy-duty fabric, reinforced construction, and temperature reduction benefits make it good value for patios and small commercial outdoor spaces; just plan installation and expect breathability rather than full waterproofing.

Frequently Asked Questions

Is this shade sail waterproof?
Answer. The fabric is water and air permeable, so it sheds some water but is not fully waterproof in heavy rain.

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 for optimal tension; contact the maker for straight-edge customization.

How durable are the attachment points?
Answer. The sail uses stainless steel D-rings and reinforced edges with double-layer stitching for commercial-standard durability and reduced fraying.