Sun Shade Sail 11ft x 18ft x 21.1ft Triangle Turquoise Blue - UV Block

In this review of the SUNN Y GUARD sun shade sail, the focus is practical: who needs a robust, breathable triangle sail and why it works. The reviewer found this 11ft x 18ft x 21.1ft turquoise blue triangle best for homeowners and renters who want reliable daytime sun protection without a permanent structure. Its single biggest selling point is the combination of up to 95% UV protection with a breathable high density polyethylene weave that reduces heat while allowing air and water to pass through.

Key Features

• High density polyethylene: 185 GSM fabric blocks most UV rays while remaining lightweight enough to handle and position during installation.
• UV block rate: Blocks up to 95% of harmful UV rays, making it effective for shaded outdoor living spaces.
• Breathable cooling: The fabric allows air to pass through, helping lower felt temperature under the sail on hot days.
• Customizable sizing: The brand offers custom sizes so the sail can be tailored to unique patios, decks, pools or carports.
• Included ropes: Ships with three (triangle) or four (square/right triangle) thickened ropes to get installation started.
• Made in USA: Locally produced option and customer support for custom orders.

Who It's For

This triangle shade sail is ideal for homeowners with a yard, deck, patio, pool area or barbecue space who want a durable, low maintenance shade option and prefer a modern look over bulky awnings. It also works well for RV owners and those who need a temporary or seasonal cover that holds up in hot, sunny climates.

It is less suitable for someone who requires a fully waterproof pavilion or a retractable, motorized awning system; for those needs a hard-shelled or mechanized product would be a better match. Also, buyers who cannot secure fixed anchor points should consult a professional before purchase.

Pros & Cons

Pros

• Effective sun protection with a realistic claim of up to 95% UV blockage.
• Breathable fabric that helps keep shaded areas cooler than solid covers.
• Durable construction and sturdy d-ring points make it suitable for extended outdoor use.
• Custom size options and included ropes simplify fitting to specific spaces.

Cons

• Not intended to be fully waterproof; rain will pass through the breathable fabric.
• For long-term durability in high-wind areas, upgraded stainless steel hardware is recommended and sold separately.

Specifications

Material	High density polyethylene (185 GSM)
UV Block Rate	Up to 95%
Shape and Size	Triangle - 11ft x 18ft x 21.1ft
Accessories Included	Rope x 3 PCS (triangle)
Custom Options	Customizable sizes available
Made In	USA

Our Verdict

The SUNN Y GUARD 11ft x 18ft x 21.1ft triangle shade sail is a smart, value-oriented choice for anyone needing dependable UV protection and improved outdoor comfort without a permanent install. Its breathable 185 GSM fabric, included ropes and custom sizing make it a practical pick for patios, pools and decks; buyers in windy or storm-prone locations should plan on upgraded stainless hardware for best longevity.

Frequently Asked Questions

Will the sail keep rain out?
Answer. The fabric is breathable and allows water to pass through, so it is not fully waterproof but will reduce direct sun and light drizzle exposure.

Are installation accessories included?
Answer. The sail ships with three thickened ropes for the triangle shape, but the manufacturer recommends stainless steel hardware for long-term durability.

Can I get a different size?
Answer. Yes, the brand offers custom sized sun shade sails and can be contacted for tailor-made dimensions.