Rounded Back Seat Cushion 19.5 x 20 x 5 in - Deep Sunbrella Comfort

In this review the Cushion Source Rounded Back Seat Cushion is evaluated for people who want a durable, deep seating option for patios, porches, or sunrooms. The single biggest reason to buy is the combination of a weatherproof Sunbrella cover and a generous 5 in CumuPlus fill that holds its shape for supportive comfort; it is a cushion aimed at outdoor use without sacrificing indoor comfort. The review considers fit, fabric performance, firmness and everyday usability to help decide if this cushion suits your seating.

Key Features

• Sunbrella performance fabric: Provides fade resistance and easy-clean durability so the cushion keeps vibrant color and stands up to outdoor exposure.
• 5 in CumuPlus fill: Delivers deep seating comfort with resilient support that is meant to retain loft for lounges, rockers and deep chairs.
• Rounded back design: The curved back and box edge styling give a tailored look and fit chairs roughly 19 in to 21 in wide and 20 in to 22 in deep for a neat appearance.
• Hidden zipper: A concealed zipper keeps the profile clean while allowing cover removal for spot cleaning or replacement.
• Made in the USA: Domestic craftsmanship since 2004 offers consistent build quality and attention to detail.

Who It's For

The cushion is ideal for homeowners with outdoor seating who want a performance fabric that resists sun fading and weather, and who need a deeper 5 in thickness for lounging comfort. It also suits indoor sunrooms or casual living spaces where a durable, easy-care cushion is preferred.

Customers who want a very soft, sink-in feel or need a custom size outside the implied 19 in-21 in width and 20 in-22 in depth range should look elsewhere, as some buyers report the firmness is on the firmer side and the fit is optimized for the specific rounded-back dimensions.

Pros & Cons

Pros

• High quality Sunbrella fabric resists fading and cleans easily for outdoor longevity.
• Deep 5 in CumuPlus fill provides supportive, long-lasting seating without quick flattening.
• Rounded back shape and box edge styling create a tailored, attractive fit for compatible chairs.
• Proudly made in the USA with a hidden zipper for a clean finish and practical cover access.

Cons

• Some customers find the cushion firmer than expected, so it may not suit those who prefer very soft cushions.
• Designed for a specific size range, so it may not fit nonstandard chairs without measuring first.

Specifications

Product type	Rounded back seat cushion
Dimensions	19.5 in x 20 in x 5 in depth
Fill	5 in CumuPlus fill
Fabric	Sunbrella performance fabric (Seville Seaside)
Design details	Curved back with box edge styling and hidden zipper
Use	Indoor and outdoor
Origin	Made in the USA

Our Verdict

The Rounded Back Seat Cushion is a sensible buy for anyone who needs a durable, weather-ready cushion with true deep seating comfort and a neat tailored look. It represents good value when durability and shape retention matter more than an ultra-soft feel, and it fits well on chairs within the stated size range.

Frequently Asked Questions

Will this cushion fade outdoors?
Sunbrella performance fabric is fade resistant and formulated to retain color outdoors under normal exposure.

Can I remove the cover for cleaning?
Yes, the cushion has a hidden zipper so the cover can be removed for spot cleaning or replacement.

What chairs will this fit?
The rounded back design is sized for chairs about 19 in-21 in wide and 20 in-22 in deep, so measure your seat before ordering.