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

In this review of the Rounded Back Seat Cushion, the bottom line is simple: shoppers who want a deep, comfortable replacement cushion for outdoor or indoor seating will appreciate the combination of durable Sunbrella fabric and a 5 in thick CumuPlus fill. The cushion is aimed at patios, porches, sunrooms and deep seating chairs where weather resistance and color retention matter, and the hidden zipper and tailored rounded back deliver a neat, custom look. For anyone needing a long-lasting, well-built seat cushion that stays vibrant in the elements, this is worth considering.

Key Features

• Sunbrella performance fabric: Provides fade resistance and reliable durability so the cushion keeps its color and appearance through sun and rain.
• 5 in CumuPlus fill: Offers plush, long-lasting support suited to deep seating chairs, rockers, and lounge furniture without flattening quickly.
• Rounded back design: The curved back and box edge styling create a tailored fit for chairs roughly 19 in to 21 in wide and 20 in to 22 in deep for a finished look.
• Indoor and outdoor use: Built to perform on patios or inside sunrooms, giving flexible placement without compromising fabric performance.
• Hidden zipper: Keeps the seam clean and allows cover removal for care while preserving the cushion's neat appearance.
• Proudly made in the USA: Assembled with consistent craftsmanship and attention to fit and finish since 2004.

Who It's For

The cushion is best for homeowners with deep seating outdoor furniture or indoor porch chairs who want a durable, stylish replacement that resists fading and holds up to weather. It suits people who prefer a thicker cushion for comfort and who value a tailored rounded back rather than a flat square profile.

Shoppers who prefer a very soft, sink-in feel may want to consider other fills, since some customers describe the firmness as somewhat firm. Also measure your chair carefully: this model is intended for seats about 19 in to 21 in wide and 20 in to 22 in deep for the best fit.

Pros & Cons

Pros

• Durable Sunbrella fabric keeps color vibrant and stands up to outdoor exposure.
• Thick 5 in CumuPlus fill provides supportive deep seating comfort for extended lounging.
• Rounded back with box edge styling gives a custom, finished look on many chair types.
• Hidden zipper and US construction add to perceived quality and ease of maintenance.

Cons

• Some buyers report the cushion is firmer than expected, so it may not suit those who want a very soft seat.
• Fit depends on chair dimensions; chairs outside the 19 in-21 in by 20 in-22 in range may not match perfectly.

Specifications

Product type	Rounded back seat cushion
Dimensions	19.5 in x 20 in x 5 in deep
Fabric	Sunbrella performance fabric (fade resistant)
Fill	5 in CumuPlus fill
Design	Rounded back with box edge styling, hidden zipper
Intended use	Indoor and outdoor seating (patio, porch, sunroom)
Origin	Made in the USA

Our Verdict

The Rounded Back Seat Cushion is a solid value for anyone who needs a durable, good-looking deep seat replacement that resists fading and holds up outdoors. Its 5 in CumuPlus fill delivers lasting support and the tailored rounded back improves fit and appearance; those wanting a softer feel should test firmness first, but for durability, fit, and finish this cushion is worth buying.

Frequently Asked Questions

Is this cushion suitable for outdoor use?
The Sunbrella performance fabric and construction are designed for outdoor exposure, making it suitable for patios and porches.

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

Can the cover be removed for cleaning?
Yes, the hidden zipper allows the cover to be removed for cleaning according to Sunbrella care instructions.