17ft x 23ft Black Sun Shade Sail UPF50 Rectangle - Cool Outdoor Cover

Our review of the ShadeMart 17' x 23' Black Sun Shade Sail finds it best suited to homeowners and small business owners who need a durable, breathable sun cover that reduces heat and blocks UV without trapping moisture. The single biggest reason to consider this shade sail is its woven HDPE fabric with UPF50 sun protection that cuts sunlight and lowers temperatures by around 10 to 15 degrees while remaining water permeable and breathable. Installation is straightforward with the stainless steel D rings and heavy duty webbing, making this a practical choice for patios, carports, pools or pergolas.

Key Features

• Woven HDPE Fabric: The material blocks up to 95% of harmful UV rays while allowing air flow so outdoor spaces stay noticeably cooler without feeling stuffy.
• Stainless Steel D Rings: Corner D rings attached to heavy duty white webbing provide reliable anchor points that resist corrosion in outdoor conditions.
• Water Permeable: The sail lets rainwater pass through rather than pooling, reducing stress on anchoring points and avoiding sagging after storms.
• Custom Sizing Available: A range of custom sizes means the sail can be tailored to fit irregular venues when measured accurately before ordering.
• Decorative Rectangle Shape: The simple rectangle profile and multiple color options allow the sail to integrate with existing outdoor designs while delivering shade.

Who It's For

The ShadeMart rectangle sail is ideal for homeowners with patios, carports, pool areas, pergolas or yard seating who want reliable sun protection and airflow rather than a fully waterproof cover. It also suits DIY installers who can use proper hardware kits to fix the sail to poles, walls, trees or roofs.

It is less suitable for someone who needs a fully waterproof canopy or a precise machine-cut rectangle without any variation; customers should measure their space carefully and accept small manual measurement variations in the fabric area.

Pros & Cons

Pros

• Durable woven HDPE construction provides long-term UV protection and has proven resilience in heavy weather.
• Breathable, water permeable design prevents pooling and improves comfort under the sail.
• Stainless steel D rings and heavy webbing make attachment straightforward and corrosion resistant.
• Custom sizing and multiple colors make it adaptable to many outdoor setups.

Cons

• Not waterproof, so it will not keep rain out and is intended for shade and UV protection only.
• Some customers report mixed size or shape perceptions, so careful measuring is required before purchase.

Specifications

Our Verdict

The ShadeMart 17' x 23' rectangle shade sail is a practical, value-minded choice for shading patios, carports and pools where UV blocking and airflow are priorities. Its durable HDPE fabric, stainless steel D rings and water permeable design make it a sensible long-term solution for outdoor shade, provided the buyer accepts that the sail is not waterproof and measures carefully for custom fit.

Frequently Asked Questions

Is this sail waterproof?
No, the fabric is water permeable and breathable; it allows water to pass through rather than acting as a waterproof cover.

Will it reduce temperature under the sail?
Yes, the woven HDPE fabric and UPF50 protection significantly reduce direct sunlight and typically lowers perceived temperature by around 10 to 15 degrees.

What hardware is included?
The product has stainless steel corner D rings attached to heavy duty webbing; proper mounting hardware kits are recommended for attaching to poles, walls or trees.