12 ft x 12 ft x 17 ft Right Triangle Sun Shade Sail - Heavy Duty UV

In this review the Royal Shade 12' x 12' x 17' right triangle sun shade sail is judged primarily on durability and real-world shading performance; it is best for homeowners who want a longlasting, breathable canopy for patios, play areas or dog runs. The biggest reason to buy is its commercialgrade 200 GSM HDPE fabric with added UV inhibitors that blocks up to 95% of harmful UV while remaining air and water permeable, delivering solid shade without trapping heat. Installation takes a little planning but the finished product looks neat and resists sagging when tensioned correctly.

Key Features

• Measurement method: Corners are measured corner to corner and edges are slightly curved to ensure a tight, neat fit after installation and to prevent midspan sagging.
• Durable material: The canopy is woven 100% 200 GSM HDPE that breathes and sheds water while resisting UV degradation and fading for long outdoor life.
• High UV protection: Built to block up to 95% of harmful UV, making it effective for daytime sun protection on patios and play spaces.
• Reinforced corners: Heavy doublelayer stitched edges and extra stitching at corners protect the stainless D rings and reduce the chance of tearing under tension.
• Permeable design: The breathable mesh lets breeze and water pass through to avoid pooling and reduce wind loading on the sail.
• Warranty and support: Manufacturer backs the sail with a 3 year UV degradation warranty and offers custom sizes on request.

Who It's For

The sail suits homeowners and renters who need durable, breathable shade for patios, decks, dog runs or playgrounds and who can install the sail to fixed points such as poles, walls or trees. Someone wanting a neat, tensioned triangular canopy will appreciate the curved edge design and reinforced corners.

Those who should look elsewhere include buyers wanting a fully waterproof tarpaulin or a decorative, lightweight fabric without structural reinforcement; if you need perfectly straight edges instead of the factory curved pattern you should contact the seller for a custom order.

Pros & Cons

Pros

• Commercial 200 GSM HDPE fabric gives a sturdy feel and long life under sun exposure.
• Blocks up to 95% UV while remaining breathable so heat does not build up beneath the sail.
• Finished edges and reinforced corners with stainless D rings simplify installation and improve durability.
• Permeable weave prevents water pooling and reduces wind stress compared with solid covers.

Cons

• Size is fixed and has received mixed feedback; verify measurements from corner to corner to avoid mismatches.
• Not fully waterproof, so it will not keep heavy rain out like a solid canopy would.

Specifications

Shape	Right triangle
Size (corner to corner)	12' x 12' x 17'
Material	100% 200 GSM HDPE (woven knitted)
UV blockage	Up to 95%
Edge construction	Double layered reinforced stitched seams
Hardware at corners	Stainless D rings (extra stitched)
Warranty	3 years UV degradation warranty

Our Verdict

The Royal Shade 12' x 12' x 17' right triangle sail is a pragmatic choice for anyone who wants a heavy duty, breathable sunshade that resists fading and UV damage while allowing air and water to pass. It is good value for outdoor shading where durability and tensioned appearance matter; confirm cornertocorner sizing and consider the optional hardware kit to get the best fit and tension.

Frequently Asked Questions

Is this sail waterproof?
Not fully; the 200 GSM HDPE mesh is water and air permeable so it prevents pooling but will not keep heavy rain completely out.

How are the measurements taken?
Measurements are taken corner to corner and the edges are slightly curved to allow a tight, neat installation and reduce sagging.

Does it include mounting hardware?
The sail has stainless D rings at each corner but hardware kits are recommended and sold separately to maximize performance and appearance.