11ft x 20ft Black Sun Shade Sail UPF50 Rectangle - Heavy Duty Outdoor

Our review of the ShadeMart 11' x 20' Black Sun Shade Sail finds it best for homeowners and small businesses who want a durable, breathable canopy that cuts heat and blocks sun without trapping water. The sail's woven HDPE fabric and stainless steel D rings feel built for weather exposure, and its UPF50 sun protection is the single biggest reason to buy if shade and UV reduction are priorities. Installation is straightforward for anyone comfortable with basic hardware kits, and the sail works well for patios, carports, pergolas and poolside cover.

Key Features

• Material: Woven HDPE fabric provides a tough, tear resistant surface that withstands outdoor use while remaining breathable.
• UV Protection: Blocks up to 95% of harmful UV rays with a UPF50 rating, noticeably lowering ambient temperature under the sail.
• Hardware: Stainless steel corner D rings attached to heavy duty white webbing give secure anchor points for proper tensioning.
• Water Permeable: The design allows water and air to pass through so rain drains instead of pooling on the fabric surface.
• Custom Sizing: Multiple sizes and custom options are offered so you can match the sail to patios, carports or irregular spaces when measured carefully.
• Styling: Rectangle shape and color choices let the sail function as both a protective cover and a decorative outdoor element.

Who It's For

The ShadeMart 11' x 20' sail suits homeowners, renters with outdoor living spaces, and small commercial sites seeking reliable sun protection that lowers heat in seating and parking areas. It is especially useful where air flow and drainage matter, such as over patios, pools and carports.

It is not for users who need a fully waterproof canopy or a perfectly rigid structure; because the fabric is water permeable and slightly flexible, those needing complete rain protection or a perfectly precise rectangle might look for a different sealed or framed solution.

Pros & Cons

Pros

• Durable HDPE fabric with stainless steel D rings delivers long lasting outdoor performance and secure anchoring.
• High UPF sun protection and measurable cooling benefits keep covered areas noticeably cooler.
• Breathable, water permeable construction prevents pooling and reduces wind load compared with solid tarps.
• Custom sizing and multiple colors let buyers tailor the sail to a variety of outdoor spaces.

Cons

• Not waterproof, so it will not keep an area dry during heavy rain.
• Some customers report size or shape variance from manual measurements, so careful measuring is required before ordering.

Specifications

Our Verdict

The ShadeMart 11' x 20' rectangle sail is a practical, value-minded choice for anyone wanting strong sun protection, airflow and durability without a sealed canopy. It is especially good for patios, carports and poolside shade where drainage and UV blocking matter; buyers should measure carefully and accept that it is water permeable rather than waterproof.

Frequently Asked Questions

Is this sail waterproof?
No. The fabric is water permeable and designed to allow water to pass through rather than form a waterproof barrier.

How much sun does it block?
The fabric blocks up to about 95% of harmful UV rays and is rated UPF50 for strong sun protection.

Can it be attached to trees or poles?
Yes. With appropriate hardware kits the sail can be anchored to poles, trees, walls or roofs but proper tensioning and anchor strength are important.