Rounded Back Seat Cushion 19.5 x 20 x 5 in Sunbrella Cast Silver

In this review the Cushion Source Rounded Back Seat Cushion in Sunbrella Elements Cast Silver is recommended for anyone who wants a durable, weather-ready upgrade to deep seating on patios or sunrooms; the single biggest reason to buy is the combination of a 5 in CumuPlus fill and fade-resistant Sunbrella fabric that keeps cushions looking sharp while remaining supportive. The reviewer found it particularly useful for chairs that need a tailored fit and comfort that stands up to regular outdoor use while retaining a smart, custom appearance.

Key Features

• Sunbrella Performance Fabric: Fade-resistant Sunbrella Elements Cast Silver keeps the cushion color vibrant through sun and moisture exposure.
• Deep Seating Comfort: The 5 in CumuPlus fill provides plush support that resists quick flattening and suits lounge or rocker chairs.
• Rounded Back Design: A curved back and box edge styling create a tailored fit for chairs approximately 19 in to 21 in wide and 20 in to 22 in deep.
• Hidden Zipper: A concealed zipper maintains the cushion's clean lines and makes the cover removable for cleaning or replacement.
• Indoor and Outdoor Use: Construction and materials are chosen to work well on patios, porches, and indoor sunrooms without sacrificing appearance.

Who It's For

This cushion is best for homeowners with deep seating patio chairs, lounge furniture, or rockers who want a long-lasting cushion that resists fading and stays supportive over time. It is a good pick for customers who prefer a tailored look and the convenience of a removable cover made with performance fabric.

Shoppers who need a very soft, sinking seat may want to look elsewhere, since several users describe the firmness as on the firmer side; also those requiring non-standard dimensions outside the 19 in-21 in by 20 in-22 in fit range should verify measurements before ordering.

Pros & Cons

Pros

• Durable Sunbrella fabric keeps colors bright and resists outdoor wear.
• 5 in CumuPlus fill offers substantial deep seating comfort and longer-lasting loft.
• Rounded back and box edge styling create a neat, tailored appearance on compatible chairs.
• Hidden zipper preserves the cushion's clean lines and allows the cover to be removed.

Cons

• Some buyers report the cushion feels firmer than expected for plush seating preferences.
• Fit is limited to chairs within the specified width and depth ranges, so exact measurements are needed.

Specifications

Product type	Rounded back seat cushion
Dimensions	19.5 in x 20 in x 5 in
Fill	5 in CumuPlus fill
Fabric	Sunbrella Elements Cast Silver performance fabric
Design features	Rounded back, box edge styling, hidden zipper
Intended use	Indoor and outdoor (patio, porch, sunroom)
Made in	USA

Our Verdict

The Cushion Source Rounded Back Seat Cushion in Sunbrella Cast Silver is a solid choice for outdoor seating that needs lasting color and supportive comfort; it offers good value for anyone with deep seating chairs who prefers a tailored look and low-maintenance fabric. Buyers who want a very soft, cloud-like seat may prefer a different fill, but for durability and neat styling this cushion performs well.

Frequently Asked Questions

Is the cover removable for cleaning?
The cushion has a hidden zipper so the Sunbrella cover can be removed for cleaning or replacement.

Will this fit my deep seating chair?
It fits chairs roughly 19 in to 21 in wide and 20 in to 22 in deep; measure your chair to confirm compatibility.

Is it suitable for outdoor use year-round?
Sunbrella performance fabric and durable construction make it appropriate for regular outdoor use, though storing cushions during extreme weather will extend life.