ShadeMart 14 ft x 21 ft White Sun Shade Sail UPF50 Rectangle - Heavy

In this review the ShadeMart 14 ft x 21 ft White Sun Shade Sail comes across as a practical, heavy duty canopy for homeowners and RV owners who want reliable UV protection without a fully waterproof tarp. The reviewer found the sail effective at blocking sun and lowering surface temperatures, while still allowing air and water to pass through; that breathability is the single biggest reason to buy for those needing long-term sun protection that resists heat buildup.

Key Features

• Material: Woven HDPE fabric provides a durable, tear-resistant surface that stands up to regular outdoor use.
• UV Protection: UPF50 construction blocks up to 95% of harmful UV rays, which noticeably reduces heat under the canopy.
• Breathability: The water permeable, air-permeable weave prevents water pooling and encourages airflow, helping keep shaded areas cooler.
• Hardware: Stainless steel corner D rings on heavy white webbing offer reliable attachment points for a variety of mounting setups.
• Custom Fit: Available in custom sizes so customers can match a sail to patios, carports, pergolas, or RV covers when measured carefully.
• Styling: Rectangle shape and neutral white finish integrate easily with outdoor decor while serving as a functional shade solution.

Who It's For

The ShadeMart rectangle sail is well suited to homeowners, RV owners, and yard or poolside users who need consistent sun protection and prefer a breathable canopy rather than a waterproof cover. Installers who want a low-profile, decorative shade piece that can attach to poles, trees, walls, or roofs will appreciate the stainless D rings and heavy duty webbing.

It is less appropriate for buyers who need a completely waterproof shelter for continuous rain protection or for those expecting exact cut-to-the-inch sizing without any manual variance; customers should measure carefully and accept minor size variation due to fabrication methods.

Pros & Cons

Pros

• Blocks a high percentage of UV rays and reduces temperature in shaded areas.
• Durable woven HDPE resists wear and performs well in windy conditions.
• Breathable fabric prevents water pooling and keeps airflow under the sail.
• Stainless steel D rings and heavy webbing simplify secure mounting.

Cons

• Not waterproof, so it will not provide full rain protection for covered items.
• Color appearance and exact linear dimensions may vary slightly from expectations.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	14 ft x 21 ft
Material	Woven HDPE (High Density Polyethylene)
UV Rating	UPF50 (blocks up to 95% UV)
Hardware	Stainless steel corner D rings on heavy duty white webbing
Waterproof	No; water permeable and breathable

Our Verdict

The ShadeMart 14 ft x 21 ft White Sun Shade Sail is a sensible buy for anyone who needs durable, breathable UV protection that looks clean and installs easily. It represents good value for patios, carports, and RV covers where heat reduction and longevity matter more than waterproofing; measure carefully and expect a sturdy, well-built canopy.

Frequently Asked Questions

Is this sail waterproof?
Answer. No, the fabric is water permeable and breathable, so it will not keep rain from passing through but will avoid water pooling.

Can I install it on a wall or tree?
Answer. Yes, the stainless steel D rings and heavy webbing allow attachment to poles, trees, walls, roofs, and similar structures with proper hardware.

Will the color fade in hot weather?
Answer. Many customers report the fabric holds color well in heat, though some variation in shade can occur depending on batch and light conditions.