15 ft x 21 ft x 25.8 ft Green Right Triangle Shade Sail - UV Block

In this review of the 15 ft x 21 ft x 25.8 ft Green Right Triangle Shade Sail from SHADESPEARE, the bottom line is simple: this is a practical, heavy-duty shade solution for homeowners who need wide, reliable sun protection over pools, patios, or driveways. The reviewer found the sail's corner-to-corner measurement and engineered curved edges deliver a taut, attractive installation that resists sagging, while the virgin polyethylene fabric provides significant UV and visibility blockage for cooler, more comfortable outdoor spaces.

Key Features

• Corner-to-corner measurement: The sail is sized from corner to corner so shoppers can plan mount points precisely and expect true coverage once installed.
• Curved edges: Edges are slightly curved using a calculated radian to prevent sagging in the middle and maintain a neat, tensioned appearance.
• Virgin polyethylene fabric: A lightweight yet strong material gives high tensile strength for durability and extended outdoor use.
• High UV blockage: The fabric provides up to 95% UV blockage and about 90% visibility blockage, reducing heat and sun exposure beneath the canopy.
• Seasonal versatility: The sail aids summer cooling and ventilation, offers some frost protection at night, and is slightly rainproof during light showers.
• Customizable and warranted: The product can be custom ordered and includes a 3-Year Limited Warranty for extra buyer confidence.

Who It's For

This shade sail is aimed at homeowners and renters who need a sizable, durable cover for an outdoor area such as a backyard, pool, patio, balcony, carport, or garden. It works well for anyone wanting substantial UV protection and a visually pleasing triangular canopy that stays tensioned thanks to its curved-edge design.

People who require a fully waterproof awning, a permanent structure, or a precise fit for irregular mounting points should consider more rigid products or professional installation; the sail is slightly rainproof but is primarily designed for sun protection and ventilation rather than heavy rain or snow load.

Pros & Cons

Pros

• Provides strong UV protection and noticeable cooling under the canopy.
• Curved-edge construction reduces mid-span sag and improves the finished look.
• Lightweight virgin polyethylene balances durability with ease of handling during install.
• Custom sizing and a 3-Year Limited Warranty increase flexibility and peace of mind.

Cons

• Hardware reviews are mixed, so expect basic fittings that may require upgrade for some installations.
• Only slightly rainproof; not intended as a full wet-weather shelter.

Specifications

Shape	Right triangle
Overall size (corner to corner)	15 ft x 21 ft x 25.8 ft
Color	Green
Material	Virgin polyethylene
UV blockage	Up to 95% UV blockage
Visibility blockage	Approximately 90%
Warranty	3-Year Limited Warranty

Our Verdict

The 15 ft x 21 ft x 25.8 ft green right triangle shade sail is a strong value for anyone needing wide sun protection with a tidy, tensioned look. Its engineered curved edges and robust polyethylene fabric deliver practical cooling and UV reduction, and the option for customization plus a 3-Year Limited Warranty make it a sensible choice for most patios, pools, and driveways.

Frequently Asked Questions

Is this sail waterproof?
The sail is slightly rainproof for light showers but is not designed to be fully waterproof for heavy rains or long-term wet conditions.

How is the measurement taken?
Measurements are taken from corner to corner, so plan mounting points accordingly and expect the stated dimensions to reflect those spans.

Does hardware come with the sail?
Basic hardware is included, though customer feedback is mixed and some users choose to upgrade fittings for heavier-duty anchors or more complex installations.