19 ft x 19 ft Blue Sun Shade Sail UPF50 Square - Cool, Breathable

In this review the ShadeMart 19' x 19' Blue Sun Shade Sail is examined for homeowners and outdoor-space owners who want a large, breathable canopy that drops temperatures and blocks sunlight. The bottom line: this woven HDPE square sail is best for patios, carports and pergolas where durable UV protection and airflow matter more than full waterproofing. The reviewer found it provides substantial shade, reduces heat under the canopy, and installs with basic hardware, making it a practical choice for everyday outdoor coverage.

Key Features

• Woven HDPE fabric: The material lets air and water pass through while blocking up to 95% of harmful UV rays, keeping the area cooler without trapping heat.
• Stainless steel D rings: Heavy duty corner rings attached to white webbing give secure anchor points that resist corrosion in outdoor exposure.
• Large 19' x 19' size: A broad square footprint covers substantial patio or carport areas and is useful for shading seating, play areas, or vehicles.
• Breathable, not waterproof: The sail is water permeable so rain drains through rather than pooling, which helps prevent sagging and mildew in wet weather.
• Custom size options: The brand offers custom sizing to fit nonstandard venues, useful when a specific dimension or tighter fit is required.

Who It's For

This shade sail is aimed at homeowners, renters with outdoor living spaces, and small businesses that need a durable, UV-blocking cover for patios, poolsides, carports, or pergola frames. People who want a breathable canopy that lowers temperatures and resists sun damage will appreciate this style.

It is less suitable for buyers who require a fully waterproof awning or a rigid shelter for heavy storms, or for those who cannot attach hardware to nearby structures; in those cases a waterproof canopy or permanent roof would be a better option.

Pros & Cons

Pros

• High UV protection and noticeable cooling under the sail.
• Sturdy hardware with stainless steel D rings and reinforced white webbing for secure mounting.
• Durable woven HDPE material that resisted heavy wind in some customer reports.
• Custom sizing available to match awkward or unique spaces.

Cons

• Not waterproof, so rain will pass through rather than sheltering from heavy downpours.
• Size variations from manual measurement mean buyers must measure carefully before ordering.

Specifications

Brand	ShadeMart
Shape	Square / rectangle style
Size	19' x 19'
Material	Woven HDPE (High Density Polyethylene)
Corner hardware	Stainless steel D rings with heavy duty white webbing
Functionality	Water permeable and breathable; UPF50, blocks up to 95% UV

Our Verdict

The ShadeMart 19' x 19' Blue Sun Shade Sail is a practical, value-oriented choice for anyone wanting reliable UV protection and improved comfort in outdoor spaces. Its sturdy hardware and breathable HDPE fabric make it ideal for patios, carports, and pergolas; just be aware that it is not intended as a waterproof shelter. For buyers seeking cooling shade and durability at a reasonable cost, this sail represents a solid option.

Frequently Asked Questions

Is this shade sail waterproof?
The sail is water permeable and breathable, so it is not waterproof; rain will pass through rather than be shed.

How much UV protection does it provide?
The fabric is rated to block up to 95% of harmful UV rays and offer UPF50-level protection.

Can it be mounted to trees or poles?
Yes, with proper hardware kits the sail can be attached to poles, trees, walls, roofs, and similar structures.