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A shade sail does one thing better than almost anything else outdoors: it drops a big patch of cool shade over a space that has no roof. No posts every few feet, no bulky frame — just a taut canopy stretched between anchor points. And a rectangular sun shade sail is the workhorse shape, because most of the areas you actually want to shade are rectangles. Patios. Decks. A stretch of poolside loungers. A backyard play area.
The catch with off-the-shelf sails is that your space is never the size they come in. So you end up with a gap on one side or a sail you can't tension properly. Ours is cut to your exact Length and Width, which is the whole point of a custom rectangle shade sail — it fits the run you're covering, corner to corner.
Made from solution-dyed Sunbrella, it throws dense shade without going dark, breathes so the space stays cool, and holds its color through the summers that fade a bargain sail to gray. As an outdoor patio shade sail, it's the one you put up once and stop thinking about.
How to Measure Your Rectangle Shade Sail
A rectangle needs two measurements:
Step 1 - Length
Measure the longer side of the area you want to cover, anchor point to anchor point.
Step 2 - Width
Measure the shorter side, again anchor point to anchor point.
Step 3 - Plan your anchors
Set your four anchor points (posts, walls, or beams) at those Length and Width dimensions, ideally at slightly different heights so the sail sheds water and tensions cleanly. Order the sail to match, and mount it to your own hardware.
Why Choose Our Rectangular Sun Shade Sail?
Fits your actual space
Cut to your exact Length and Width, so you cover the whole area instead of leaving a sunny gap where a stock size fell short.
Cool shade, not a hot tarp
Breathable Sunbrella vents heat and takes wind load off the corners, so the shade stays cool and the sail stays put.
Corners built to tension
Reinforced D-ring corners let you pull all four points tight for a flat, sag-free sail that won't flap itself loose.
Backed by ZIPCushions
ZIPCovers is the sister brand to ZIPCushions — 75,000+ homes, 4.9 stars on Google, and deep Sunbrella know-how behind every sail.
Not sure how to set your anchor points? We'll walk you through it — +1 720-882-0756 or sales@zipcovers.com. Covering an L-shaped or three-post corner instead? See the triangle sail.
A rectangular sun shade sail lives in full sun and full tension, so both the fabric and the corners have to hold up. Ours are built for it.
Sunbrella canopy
Solution-dyed acrylic with the color locked into the fiber — it resists fading and stays true through years of direct exposure, unlike the cheap knitted sails that go pale and brittle in a couple of seasons.
Breathable shade
The weave lets hot air pass through instead of ballooning against a sealed sheet. That's what keeps the shade cool underneath and takes load off the corners in a gust.
Reinforced tensioning corners
Each corner is reinforced and fitted with a heavy-duty D-ring, so you can pull the sail drum-tight across all four points. Even tension is what stops the flap and sag that ruins a limp shade sail.
Water-repellent, not waterproof
Sunbrella sheds light rain, but a shade sail is a breathable, angled canopy — not a sealed roof. It's built for sun, not for keeping a space bone-dry in heavy rain.
• Solution-dyed Sunbrella canopy that throws dense, cool shade over patios, decks, play areas, and poolside seating
• Built to your exact Length and Width — a true custom rectangle shade sail, not a stock 10x13 forced to fit
• Breathable weave lets heat rise through instead of trapping it, so the shade below stays cool
• Reinforced corners with heavy-duty D-rings at each point for even, sag-free tensioning
• Fade- and UV-resistant color engineered for full, direct-sun exposure season after season
• Water-repellent finish sheds light rain (breathable shade sail, not a waterproof roof)
• Shade sail only — mounting posts and hardware are not included
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