Custom Size 20 ft x 21 ft Red Rectangle Sun Shade Sail - UPF50

Our review of this custom size 20 ft x 21 ft red rectangle sun shade sail finds it best for homeowners and small businesses who need heavy duty, tailored sun protection. The biggest reason to choose it is the combination of durable 200 GSM HDPE fabric and reinforced fittings that deliver reliable 95% UV blockage and a noticeably cooler shaded area. The sail ships as an order-to-make canopy, so buyers who need a specific D-ring-to-D-ring measurement will appreciate the custom fit option and commercial-grade construction.

Key Features

• 95% UV blockage: The 200 GSM HDPE material blocks up to 95% of harmful UV rays so outdoor spaces stay safer for guests and family.
• Temperature reduction: The shade sail can lower surface temperatures by as much as 15 degrees compared to unshaded areas, which helps comfort on hot days.
• Heavy duty construction: Stainless steel D-rings, reinforced edges, and double-layer stitching improve longevity and resist fraying in regular use.
• Custom sizing: Made to order from D-ring to D-ring for a tailored fit, with straight-edge customization available on request.
• Breathable and water permeable: The HDPE weave is water and air permeable so the canopy drains and breathes instead of trapping moisture.
• Installation flexibility: Can be attached to trees, roofs, walls, or poles using a mounting kit and recommended clearances for best tension.

Who It's For

The shade sail is ideal for patio and garden owners, cafes with outdoor seating, and anyone needing a large, custom canopy that balances sun protection with airflow. It suits users who value a tailored fit and commercial-grade fittings that stand up to regular outdoor exposure.

It is less suitable for buyers who want a temporary pop-up shelter or a fully waterproof awning; this product is designed for semi-permanent shade where breathability and UV protection are priorities rather than total rain protection.

Pros & Cons

Pros

• Excellent sun protection with up to 95% UV blockage from the 200 GSM HDPE fabric.
• Sturdy build including stainless steel D-rings and reinforced edges for long-term durability.
• Custom sizing and optional straight-edge customization deliver a precise fit for awkward spaces.
• Users report good value and that the sail has held up in high winds, reflecting real-world durability.

Cons

• The sail is water and air permeable rather than fully waterproof, so it will not keep out heavy rain completely.
• Custom ordering requires careful measurement from D-ring to D-ring, which may be tricky for first-time installers.

Specifications

Our Verdict

This custom 20 ft x 21 ft red rectangle shade sail is a sensible buy for anyone who needs a durable, tailored sun canopy that emphasizes UV protection and airflow. With heavy duty fittings, clear installation guidelines, and real-world durability reported by customers, it offers strong value for patios, outdoor dining, and shaded play areas where breathable protection and a precise fit matter most.

Frequently Asked Questions

Is this shade sail waterproof?
Answer. The HDPE material is water and air permeable, so it sheds some moisture but is not a fully waterproof tarp for heavy rain.

How should I measure for a custom order?
Answer. Measure from D-ring to D-ring for each side; leave at least 0.5 ft gap between D-rings and poles or reduce side lengths by 1 to 1.5 ft where needed for tension.

How durable is the hardware?
Answer. The sail uses stainless steel D-rings, reinforced edges, and double-layer stitching, and comes with a 3 year assurance to back construction quality.