Sun Shade Sail 11 ft x 21 ft Turquoise Blue Rectangle - Durable UV

In this review the SUNLAX Sun Shade Sail 11' x 21' in turquoise blue is evaluated for homeowners who want affordable, effective sun protection for patios, decks, pergolas or backyard seating areas. The bottom line: this rectangle canopy delivers substantial cooling and UV reduction because it is made from high-density polyethylene with a 90%-95% shading rate and blocks up to 95% of UV rays, making it a straightforward choice for anyone seeking reliable shade without an expensive permanent structure.

Key Features

• High-density material: The knitted mesh is made of non-recycled high-density polyethylene so it blocks up to 95% of UV rays while allowing air to circulate for cooling comfort.
• Strong construction: Cut from a complete mesh with double strength stitched seams to resist fraying and extend the sail's usable life.
• Corner hardware: Each corner has an anti-rust D-ring and the package includes four cords, simplifying typical installations.
• Curved edge design: Curved edges reduce sagging and improve tensioning so the sail maintains a neater look and more consistent shade.
• Permeable fabric: The mesh lets raindrops and breezes pass through, preventing water pooling and improving wind performance.
• Custom size option: The listing notes custom sizing is available, which helps fit irregular or larger outdoor spaces.

Who It's For

This sun shade sail is best for homeowners and renters who want an economical, semi-permanent canopy that provides real UV protection and an attractive pop of color for outdoor seating areas, patios, decks and pergolas. It suits people who prefer a lightweight, breathable cover rather than a solid waterproof roof and who can mount the sail using existing posts, walls or purchased mounting hardware.

It is less suitable for those who need full waterproofing, a rigid structure to stand up to extreme storms, or who cannot secure anchoring points 0.5-1 ft away from the sail's D-rings. If you need a hardtop, waterproof awning or integrated mounting kit, look elsewhere.

Pros & Cons

Pros

• High shading rate and UV blocking for cooler, safer outdoor spaces.
• Durable stitching and anti-rust D-rings improve longevity in outdoor conditions.
• Permeable mesh reduces wind load and prevents water pooling during light rain.
• Curved edges keep the sail taut and visually pleasing once installed.

Cons

• Not waterproof, so it will not provide full rain protection in heavy downpours.
• Mounting accessories are sold separately if you lack suitable anchor points.

Specifications

Product name	SUNLAX Sun Shade Sail 11' x 21' Rectangle
Color	Turquoise Blue
Material	High-density polyethylene knitted mesh
Shading rate	90%-95% (white series 80%-85%)
UV protection	Blocks up to 95% of UV rays
Hardware	4 anti-rust D-rings; includes 4 cords
Design notes	Curved edges to prevent sagging; permeable, not waterproof

Our Verdict

The SUNLAX 11' x 21' turquoise rectangle shade sail is a smart, value-oriented choice for adding reliable UV protection and comfortable dappled shade to patios and decks. With durable construction, anti-rust hardware and a curved edge design that reduces sagging, it is ideal for homeowners who want breathable, easy-to-install shade rather than a waterproof canopy.

Frequently Asked Questions

Is this shade sail waterproof?
No. The fabric is permeable to allow breezes and raindrops through; it is not designed as a waterproof cover.

How much space should I leave for mounting?
Leave about 0.5-1 ft between the fixing point and the shade sail for mounting hardware, hooks or rope.

Does it include installation hardware?
The sail includes 4 cords and 4 anti-rust D-rings, but additional mounting accessories such as turnbuckles or pad eyes should be purchased separately if you do not have anchor points.