Cushion Source Rounded Back Seat Cushion, 19.5 in x 20 in x 5 in

In this review the Cushion Source Rounded Back Seat Cushion is evaluated as a go-to option for anyone upgrading deep seating on patios, porches, or indoor sunrooms. The single biggest reason to buy is its combination of a 5 in thick CumuPlus fill and Sunbrella performance fabric, which together deliver plush, long-lasting comfort while keeping color and fabric integrity in variable weather. The rounded back shape and box edge styling make it a neat fit for many chairs that are roughly 19 in to 21 in wide and 20 in to 22 in deep, so it works well when tailored appearance and durability are priorities.

Key Features

• Sunbrella Performance Fabric: Keeps the cushion looking vibrant and resists fading and weather wear, making it suitable for outdoor use.
• 5 in CumuPlus Fill: Provides deep seating comfort and resilient support for long lounging sessions without flattening quickly.
• Rounded Back Design: Curved back and box edge styling create a tailored, finished look that fits a wide range of deep seating chairs.
• Hidden Zipper: A discreet closure that preserves the cushion silhouette while allowing simple cover removal for cleaning or replacement.
• Proudly Made in the USA: Domestic craftsmanship since 2004 suggests consistent quality control and material standards.

Who It's For

This cushion is best for homeowners with deep seating patio furniture, porch rockers, or indoor sunroom chairs who want a durable, fade resistant cover and a plush 5 in thickness for comfort. It suits people who appreciate a tailored rounded back aesthetic and prefer Sunbrella fabrics for low-maintenance outdoor use.

Those who should look elsewhere include buyers needing a very specific custom size outside the 19 in-21 in by 20 in-22 in fit range, or anyone seeking ultra-soft pillow-like cushions with less structure; this is designed for supportive deep seating rather than loose, floppy fill.

Pros & Cons

Pros

• Durable Sunbrella fabric resists fading and holds up to outdoor exposure.
• Generous 5 in CumuPlus fill gives comfortable, long-lasting support for deep-seat furniture.
• Rounded back and box edge styling deliver a neat, tailored appearance on a variety of chairs.
• Hidden zipper and domestic manufacturing indicate attention to finish and quality.

Cons

• Fit is targeted to chairs roughly 19 in-21 in wide and 20 in-22 in deep, so very large or small seats may not match perfectly.
• Sunbrella fabric and premium fill add cost compared with basic cushions, which may not suit budget buyers.

Specifications

Our Verdict

The Cushion Source Rounded Back Seat Cushion is a solid choice for anyone with deep seating furniture who values weather-resistant Sunbrella fabric and a substantial 5 in CumuPlus fill. It delivers a tailored look, dependable support, and straightforward care, making it good value for outdoor or sunroom use for homeowners who need the specified fit range.

Frequently Asked Questions

Will this cushion fit my deep seating chair?
It is designed for chairs about 19 in-21 in wide and 20 in-22 in deep, so measure your seat to confirm compatibility.

Is the cover removable for cleaning?
Yes, the cushion has a hidden zipper which allows the cover to be removed for cleaning or replacement.

Can it be used outdoors year-round?
Sunbrella performance fabric resists fading and weather effects, making it suitable for regular outdoor use, though seasonal storage will extend its life.