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  • Protection Guaranteed
  • Made to Measure
  • Precision Custom Fit
  • Any Shape
  • Design Expert Verified

Custom Trapezoidal Prism Shaped Covers

Price with selected options

Tailored Fit
Tailored Fit
Easy to Clean
Easy to Clean
Secure Closure
Secure Closure
Breathable
Breathable
Tear Resistant
Tear Resistant
Weatherproof
Weatherproof

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Why Order from ZIPCovers?

  • ★ We use premium 18oz material—3x heavier than the competition—to ensure superior, long-lasting protection against all weather conditions.
  • ★ Handcrafted by the same experts behind ZIPCushions, bringing the reliability of 1,000+ 5-star reviews to your covers.
  • ★ Our human design experts personally review every single order. If something in your measurements looks a little off, we'll reach out to double-check your size and fit so you get a perfect fit the first time.

Description

Precision Protection for Angled & Tapered Designs
Trapezoidal or prism-shaped furniture adds bold geometry to patios and modern outdoor settings—but it’s notoriously hard to protect. Standard rectangular covers leave excess fabric along the sides or fail to align with the front slope, leading to pooling water and wind lift.

Our Custom Trapezoidal Prism-Shaped Covers solve this by matching the incline and taper of your piece exactly. The angled pattern hugs the structure’s lines for a sleek, stable fit that looks as good as it performs.

Why Choose ZIPCovers Trapezoidal Prism Covers?

  • Industry-Exclusive 18 oz Fabric Strength: At 18 ounces per square yard, our PVC-coated polyester far exceeds typical outdoor fabrics. It resists abrasion, UV exposure, and water penetration while maintaining flexibility year after year. Lighter 8–12 oz fabrics can’t compete in longevity or structural integrity.
  • Precision-Angled Engineering: Each cover is drafted to your specific Height, Total Depth, Width, Front Height, and Depth of Top. This ensures that every panel meets at the exact slope your furniture demands—no bulging at the base or tension at the edges.
  • Ventilation Built for Slope Stability: Integrated vents allow airflow beneath the cover while preserving the trapezoidal seal. This prevents pressure buildup under angled surfaces and keeps internal temperatures regulated.
  • Wind-Secure Drawstring System: Rust-proof grommets and adjustable drawstring keep the cover anchored, even on windy decks or rooftops.
  • Decade-Long Durability Promise: Every trapezoidal prism cover is backed by ZIPCovers’ 10-year warranty, reflecting true, tested endurance—not marketing claims.

Our trapezoidal prism covers are ideal for:

  • Slanted-back benches and seating blocks
  • Tapered outdoor consoles or storage units
  • Angled daybeds and modern geometric furniture
  • Concrete or stone seating with inclined tops
  • Custom-built-in deck furniture and architectural features

Fabrics Information

Each cover is made from ZIPCovers’ 18 oz PVC-coated polyester, our highest-grade outdoor material. The PVC coating blocks moisture completely, while UV-stable pigments resist fading and brittleness under sun exposure.

Feature Highlights

  • Engineered for trapezoidal or sloped-sided furniture and structures
  • Heavy-duty 18 oz PVC-coated polyester for superior weather resistance
  • Waterproof and UV-stabilized for long-term outdoor performance
  • Precisely angled pattern built to match your furniture’s unique slope
  • Adjustable drawstring hem and rust-proof grommets for wind-secure fit
  • Integrated handles for effortless removal and setup
  • Supported by 10-year warranty

Why ZIPCovers Is Built Better

Features
ZIPCovers
Competitors
Fabric Weight
18 oz Heavy-Duty PVC Coated Polyester
8–12 oz (varies by product)
Material Strength
3x thicker & more abrasion-resistant
Standard outdoor-grade
Waterproofing
100% Waterproof with sealed coating
Water-resistant (not fully sealed)
UV Protection
Advanced UV inhibitors (fade & crack resistant)
Basic UV treatment
Tear & Rip Resistance
Industrial-grade tensile strength
Moderate durability
Cold-Weather Performance
Flexible in extreme temperatures
Can stiffen/crack over time
Stitching Quality
Double-stitched, reinforced stress points
Single stitching on most products
Customization Accuracy
Human expert review before production
Automated sizing with limited checks
Fit Guarantee
Precision-fit promise (reviewed dimensions)
Size-based fit (tolerance varies)
Warranty
Up to 10-Year Warranty
Up to 5 Years
Designed For
Long-term outdoor & commercial use
Residential/light outdoor use

Frequently Asked Questions

Furniture with angled or tapered sides—like modern benches, sloped consoles, geometric loungers, or architectural seating blocks—benefits most from this design. These covers replicate the slope and angle for accurate protection.
Total Depth” measures the entire side from back base to front base, while “Depth of Top” measures the top plane along the slope. The difference defines the exact angle of your furniture’s incline.
Yes. The 18 oz PVC-coated polyester withstands abrasion and moisture, making it ideal for protecting hard-surface materials like concrete, composite wood, or stone benches.
Absolutely. Provide accurate measurements for each dimension, and our patterning process accommodates variations in slope or uneven front/back ratios.
No. The slanted geometry combined with waterproof fabric encourages natural runoff. Water slides away from the high-back area toward the front without pooling.
Yes, if your boxes or planters have sloped sides or lids. The trapezoidal prism shape ensures a snug contour that prevents debris and moisture from entering around the edges.
Let it air-dry completely after cleaning, then fold loosely to avoid creasing. Store in a cool, shaded area—avoiding sharp bends—to extend fabric life.

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Customer Reviews

Based on 82 reviews
88%
(72)
7%
(6)
0%
(0)
2%
(2)
2%
(2)
H
Henry

I received the wrong item and charged an additional $34 for import fees
They have replied that I will receive the $34 back but I’m still waiting for an update on the cover

D
Dondi Allison
Disappointed

The size is perfect, however I am disappointed that there is no zipper in it. It takes 2 people to put the cover on without being able to open it on one corner.

P
Peter

Love it

P
Peter

Love it

P
Peter

Great product

E
Everette

Cover feels substantial and durable

A
Aaron

Great covers, just as advertised

K
Kirsten

Great waterproof material and made to spec.

W
William

The material is good quality. The fit is not good, despite their website requiring a number of different measurements. Part of me suspects the website photos were generated by AI, as they’re almost too perfect.

J
Jennifko
Worth the money

I just received my order. I am very happy with the product.
It fits perfectly. Please let the people who created the cover know; they did a great job.
Here's a picture. I hope the material will last a long time against the sun. Just keep in mind that it does take 4-6 weeks so be very patient unlike me. haha. totally worth it