Custom Size 11ft x 21ft x 23.7ft Waterproof Grey Triangle Sun Shade

In this review of the 11ft x 21ft x 23.7ft waterproof grey triangle sun shade sail, the bottom line is simple: it is a practical, heavy-duty canopy for patios, carports, and yards where reliable water resistance and UV blocking matter most. The reviewer found the single biggest reason to buy is its combination of a PU-coated polyester fabric that keeps rain out while cutting solar heat, making outdoor spaces noticeably cooler and more usable. This review focuses on real-world durability, finish quality, and everyday usefulness rather than marketing claims.

Key Features

• Waterproof material: The polyester fabric with PU waterproof coating keeps rain and wind-driven moisture from passing through, so items under the sail stay drier during showers.
• High UV blockage: With up to 90% UV blockage, the sail reduces direct sun exposure and protects skin and furnishings from strong sunlight.
• Temperature reduction: The shade can lower the air temperature under the canopy by up to about 15 degrees, making patios and carports more comfortable in hot weather.
• Reinforced edges and corners: Dual-layer white webbing along edges and stainless steel D rings at corners provide stronger anchor points for longer-lasting tension and resistance to wear.
• Fast setup: The sail can be taken down or installed in roughly five minutes, offering convenient seasonal or temporary use without specialized tools.
• Limited warranty: A 3 year limited warranty gives added confidence in the construction and materials.

Who It's For

The sail is best for homeowners or renters who want a tough, waterproof shade for a patio, yard or carport and need a quick, removable solution that also blocks a large portion of UV rays. It fits users who value reinforced corners and stainless steel hardware because those details help keep the sail secure in exposed locations.

This product is less suited for buyers who need full custom engineering for extreme wind or permanent, structural roofing; those customers should look for fixed canopies or professional awning systems designed for structural loads and snow or hurricane-level conditions.

Pros & Cons

Pros

• Waterproof PU-coated polyester provides dependable rain protection for outdoor seating and vehicles.
• Blocks up to 90% of harmful UV, improving comfort and protecting surfaces from sun damage.
• Reinforced edges with dual webbing and stainless steel D rings improve longevity and anchoring strength.
• Quick to install or remove, which is useful for seasonal use or temporary shade needs.

Cons

• Size feedback is mixed, so buyers should verify measurements carefully because some customers found the coverage smaller than expected.

Specifications

Product Type	Waterproof triangle sun shade sail
Size	11ft x 21ft x 23.7ft (custom size available)
Material	Polyester with PU waterproof coating
UV Protection	Blocks up to 90% of UV
Edges & Corners	Dual-layer white webbing; stainless steel D rings
Warranty	3 year limited warranty

Our Verdict

The 11ft x 21ft x 23.7ft waterproof grey triangle sun shade sail is a solid value for anyone who needs a removable, weather-resistant shade that also cuts UV and lowers temperature under the canopy. Its reinforced finishing and stainless hardware make it durable for everyday outdoor use, though buyers should confirm the exact coverage they need before ordering.

Frequently Asked Questions

Is the fabric fully waterproof?
The polyester with PU coating is designed to be waterproof and resists water and wind-driven moisture, keeping the area underneath drier than an uncoated sail.

How much UV protection does it provide?
The sail blocks up to 90% of harmful UV, which reduces sun exposure and helps lower temperature under the shade.

Does it come with installation hardware?
Corners are finished with stainless steel D rings attached to dual webbing; additional mounting hardware is typically sourced separately depending on the installation points.