17ft x 17ft x 17ft Black Triangle Sun Shade Sail - Custom Size UPF50

Our review of the custom 17' x 17' x 17' black triangle shade sail finds it best for homeowners and light commercial spaces that need reliable sun protection and a cooled outdoor area. The biggest reason to buy is the combination of a heavy 200 GSM HDPE fabric with reinforced hardware that promises 95% UV protection and measurable temperature reduction, making patios, play areas, and seating zones noticeably more comfortable under prolonged sun exposure.

Key Features

• 95% UV blockage: The 200 GSM HDPE material blocks up to 95% of harmful UV rays to protect people and furnishings beneath the sail.
• Temperature reduction: The mesh fabric lowers surface and air temperature under shade by up to 15 degrees compared with unshaded areas, improving comfort on hot days.
• Customizable fit: Measurements are taken D-ring to D-ring so the sail can be made to order and fit specific layouts, with straight-edge customization available on request.
• Durable construction: Reinforced edges, double-layer stitching and stainless steel D-rings deliver commercial-standard build quality and a three year assurance.
• Permeable design: The water and air permeable fabric reduces wind load and allows rain to pass through instead of pooling on the canopy surface.
• Flexible installation: Can be attached to trees, walls, roofs or poles using common mounting hardware, with recommended corner gap for best tensioning.

Who It's For

This shade sail is ideal for homeowners with patios, decks, poolside seating or children's play spaces who want a tailored shade solution rather than a fixed pergola. Small businesses, cafes or community spaces that need a lightweight, commercial-standard canopy can also benefit from the fabric's UV protection and temperature reduction.

It is less suitable for buyers who need a rigid, waterproof roof or for installations in extremely exposed coastal locations where UV and salt air demand specialized marine fabrics; some customers reported variable long-term durability in harsh sun, so high-exposure installations should be monitored.

Pros & Cons

Pros

• High sun protection that blocks up to 95% of UV rays for safer outdoor use.
• Notable cooling effect, reducing temperatures by as much as 15 degrees under the sail.
• Sturdy, commercial-style hardware and reinforced stitching add real durability and ease of tensioning.
• Custom sizing from D-ring to D-ring allows a tailored fit for odd-shaped areas.

Cons

• As a permeable HDPE mesh, it is not fully waterproof, so it does not create a dry shelter during heavy rain.
• Durability feedback is mixed in very harsh sun; some installations showed wear after about a year.

Specifications

Our Verdict

For anyone seeking a breathable, high-UV-blocking shade solution that can be made to fit a specific outdoor area, this custom triangle sail is good value and practical. It combines a heavy 200 GSM fabric, reinforced hardware and useful cooling without the bulk of a permanent structure, though buyers in extremely harsh sun should expect to inspect for wear over time.

Frequently Asked Questions

Is this sail waterproof?
Answer. The HDPE mesh is water and air permeable, so it sheds some rain but is not a fully waterproof roof.

How are sizes specified?
Answer. Sizes are made to order measured from D-ring to D-ring so the sail fits the intended anchor points.

What mounting options work?
Answer. It can be attached to trees, walls, roofs or poles using mounting hardware kits; allow a corner gap for proper tensioning.