21 ft x 21 ft Turquoise Triangle Sun Shade Sail - Durable UV Block

Our review of the 21' x 21' x 21' Turquoise Triangle Sun Shade Sail finds it best suited for homeowners and renters who need broad, attractive sun protection over a pool, patio, or carport. The single biggest reason to buy is the combination of a curved-edge design and virgin polyethylene fabric that resists sagging while blocking up to 95% of harmful UV, so it both looks tidy and actually cools covered spaces. Installation is straightforward for DIYers and the option for custom orders makes it flexible for odd layouts.

Key Features

• Corner-to-corner measurement: Accurate sizing from corner to corner means the sail fits triangular layouts as advertised and simplifies planning for anchor points.
• Curved edges: Precisely calculated radian edges reduce midspan sag, maintaining a taut, professional appearance and consistent performance over time.
• Virgin polyethylene fabric: The lightweight but strong material provides up to 95% UV blockage while remaining durable against regular outdoor use.
• Weather versatility: The sail offers shading and cooling in summer, ventilation and some frost protection at night, and light resistance to rain during wet periods.
• Custom orders available: Buyers can request tailored sizes or adjustments to better fit patios, pools, or carports where standard dimensions are not ideal.
• 3-year limited warranty: A limited warranty provides added confidence in workmanship and materials for normal use.

Who It's For

This shade sail is ideal for homeowners with outdoor living spaces like pools, patios, gardens, driveways, and carports who want a cost-effective, heavy-duty sun screen that reduces UV exposure and keeps areas cooler. It also suits people mounting sails among trees or to existing posts, since customers report it works well in those situations.

It may be less appropriate for buyers expecting full waterproof performance in heavy storms or those who prefer a rigid permanent canopy; the sail is slightly rainproof but not a full-weather roof. Also, if included hardware is a primary concern, note that customer feedback on the hardware package was mixed, so planning for alternate fittings may be wise.

Pros & Cons

Pros

• High UV protection keeps covered areas noticeably cooler and safer from sun exposure.
• Curved edges and corner-to-corner sizing prevent sagging and maintain a neat look.
• Lightweight virgin polyethylene offers strong tensile strength with good durability.
• Custom sizing and a 3-year limited warranty add flexibility and assurance.

Cons

• Only slightly rainproof, so it is not a substitute for a full waterproof shelter in heavy rain.
• Hardware included receives mixed reviews, so you may need to source stronger fittings for high-wind locations.

Specifications

Shape	Triangle
Size (corner to corner)	21' x 21' x 21'
Color	Turquoise
Material	Virgin polyethylene
UV blockage	Up to 95%
Visibility reduction	Approximately 90%
Warranty	3-Year Limited Warranty

Our Verdict

The 21' triangle shade sail is a practical, good-value choice for anyone wanting reliable sun protection for pools, patios, or carports; its curved-edge design and strong virgin polyethylene fabric help prevent sagging and deliver effective UV blockage. Choose this if you need a breathable, attractive canopy and be ready to review or upgrade mounting hardware for the best long-term performance.

Frequently Asked Questions

Does the sail block UV rays effectively?
Yes, the fabric provides up to 95% UV blockage, which significantly reduces sun exposure under the canopy.

Is it waterproof?
The sail is slightly rainproof and sheds light rain, but it is not intended as a full waterproof roof in heavy downpours.

Can I order a custom size?
Yes, the brand accepts custom orders to fit nonstandard patio or pool layouts.