Rounded Back Seat Cushion 19.5in x 20in x 5in - Sunbrella Black

Our review of the Rounded Back Seat Cushion 19.5in x 20in x 5in finds it best suited for homeowners who want a durable, tailored cushion for deep seating on patios or sunrooms; the single biggest reason to buy is the combination of a true 5in CumuPlus fill and fade-resistant Sunbrella fabric that holds up in sun and damp conditions. The cushion delivers a tailored appearance with a curved back and box edge styling that fits chairs about 19in-21in wide and 20in-22in deep, and the hidden zipper and American craftsmanship are noticeable quality touches.

Key Features

• Sunbrella performance fabric: Keeps color vibrant and resists fading and mildew so the cushion looks newer longer in outdoor settings.
• 5in CumuPlus fill: Provides deep seating comfort and resilient support for rockers, lounge chairs, or deep patio seats without flattening quickly.
• Rounded back design: Curved back and box edge styling create a tailored fit that complements both traditional and modern outdoor furniture.
• Hidden zipper: Clean appearance and easier care since the cover can be removed without visible fastenings disrupting the look.
• Proudly made in the USA: Offers precise construction and quality control from a company with experience since 2004.

Who It's For

This cushion is for anyone furnishing a patio, porch, or indoor sunroom who needs a durable seat pad that matches deep seating chairs roughly 19in to 21in wide and 20in to 22in deep. It particularly suits those who prioritize fabric longevity and a neat, tailored look provided by the rounded back and box edge styling.

People who want a very soft, plush sink-in feel may want to look elsewhere since some users note the cushion has firmer support out of the box. Also, those requiring custom or nonstandard dimensions should consider a made-to-measure option rather than this sized variation.

Pros & Cons

Pros

• High-quality Sunbrella fabric resists fading and holds up well outdoors.
• Generous 5in CumuPlus fill delivers lasting support for deep seating.
• Rounded back and box edge styling provide a neat, tailored fit on compatible chairs.
• Hidden zipper and US construction add to perceived durability and finish.

Cons

• Some buyers find the firmness mixed - it may feel firmer than expected for people seeking a very soft cushion.
• Size is specific to a narrow range of chair dimensions, so it may not suit all seating without checking measurements.

Specifications

Our Verdict

For anyone who needs a durable, well-finished cushion for deep outdoor or sunroom seating, this Rounded Back option is a solid value: the Sunbrella fabric and 5in CumuPlus fill combine to deliver long-lasting support and color retention, while the tailored rounded back gives a cleaner look than standard square pads. It is best chosen when dimensions match and firmer support is acceptable.

Frequently Asked Questions

Will this cushion work outdoors year-round?
Yes, the Sunbrella performance fabric is designed to resist fading and mildew for outdoor use, though prolonged exposure in extreme conditions may shorten fabric life.

Can the cover be removed for cleaning?
Yes, the cushion has a hidden zipper so the cover can be removed for cleaning according to Sunbrella care instructions.

What chair sizes does this fit?
The rounded back design is intended for chairs approximately 19in-21in wide and 20in-22in deep.