ShadeMart 6 ft x 21 ft White Sun Shade Sail UPF50 Rectangle

Our review of the ShadeMart 6 ft x 21 ft white rectangle shade sail finds it a practical, heavy duty option for homeowners who need reliable sun protection for patios, carports, or pool areas. The biggest reason to consider this sail is its combination of durable woven HDPE fabric and UPF50 sun blocking, which cuts heat and harmful UV while staying breathable and water permeable. Installers will appreciate the stainless steel D rings and reinforced webbing that simplify anchoring to trees, posts, or walls.

Key Features

• Material: Woven HDPE fabric provides a strong, tear-resistant canopy that stands up to regular outdoor use.
• UV Protection: UPF50 rating blocks up to 95% of harmful UV rays, noticeably lowering temperatures beneath the sail.
• Breathability: The water permeable weave allows rain and air to pass through, reducing wind stress and pooling during wet weather.
• Hardware Ready: Stainless steel corner D rings attached to heavy duty webbing make it easier to secure the sail and maintain tension.
• Custom Sizing: Multiple custom sizes are available so you can match the sail to unusual or large outdoor spaces when measured accurately.
• Design: A simple rectangle shape and neutral white color integrate with many outdoor decors while providing functional shade.

Who It's For

The ShadeMart rectangle shade sail is best for homeowners and renters who need a breathable, UV-blocking canopy for patios, carports, pergolas, or pool areas and who prefer a simple rectangular footprint. It suits DIY installers who can attach the sail to walls, poles, or trees and want hardware-ready corners for straightforward mounting.

It is less suitable for buyers who need a fully waterproof canopy or who demand precision-cut geometric perfection; some customers reported size variances and that the sail may not lay as a perfect rectangle if measurements or mounting points are off.

Pros & Cons

Pros

• Durable woven HDPE construction resists tearing and held up in harsh weather for many users.
• Effective UPF50 sun protection and measurable ambient temperature reduction under the canopy.
• Breathable, water permeable weave prevents water pooling and reduces wind load on the fabric.
• Stainless steel D rings and reinforced webbing simplify secure installation.

Cons

• Not waterproof, so it will not keep out rain for covered living spaces.
• Size and shape can vary slightly due to manual measurements and tensioning during installation.

Specifications

Brand	ShadeMart
Shape	Rectangle
Size	6 ft x 21 ft
Material	Woven HDPE (High Density Polyethylene)
UV Protection	UPF50, blocks up to 95% UV rays
Corners	Stainless steel D rings with heavy duty webbing
Weather	Water permeable / breathable (not waterproof)

Our Verdict

The ShadeMart 6 ft x 21 ft white rectangle shade sail is a good-value, functional canopy for anyone who needs strong UV protection and a breathable cover for outdoor living areas. Its heavy duty HDPE fabric, reinforced corners, and temperature-reducing performance make it a reliable choice for patios and carports, provided buyers accept that it is not waterproof and that sizing requires careful measurement.

Frequently Asked Questions

Is this shade sail waterproof?
The fabric is water permeable and breathable, so it will let water pass through and is not designed to be waterproof.

How much UV protection does it provide?
The sail has a UPF50 rating and is designed to block up to 95% of harmful UV rays.

Can it be attached to different structures?
Yes; with proper hardware kits it can be anchored to poles, trees, walls, roofs and similar structures using the stainless steel D rings.