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

In this review the Cushion Source Rounded Back Seat Cushion is judged primarily as a comfort upgrade for deep seating chairs and outdoor furniture. It is aimed at homeowners who want a durable, colorfast cushion that feels plush without losing shape. The single biggest reason to buy is the 5 in CumuPlus fill paired with Sunbrella performance fabric, which delivers long-lasting support and fade resistance for patios, porches, or indoor sunrooms while maintaining a tailored, rounded-back look.

Key Features

• Sunbrella performance fabric: Provides fade-resistant coverage that holds vibrant color through sun exposure and frequent outdoor use.
• 5 in CumuPlus fill: Offers deep seating comfort with resilient support for rockers, lounge chairs, or deep patio seats without feeling flat.
• Rounded back design: Curved back and box edge styling create a tailored fit for chairs approximately 19 in-21 in wide and 20 in-22 in deep.
• Indoor and outdoor use: Built to perform on patios and porches as well as indoor sunrooms, making the cushion versatile for changing seasons.
• Hidden zipper: A concealed closure keeps the profile clean and makes cover removal straightforward for cleaning or replacement.
• Made in the USA: Constructed with domestic craftsmanship since 2004 for consistent build quality and attention to detail.

Who It's For

The cushion suits homeowners and renters with deep seating chairs, rockers, or lounge furniture who prioritize a plush 5 in seat and durable exterior fabric. It is particularly useful for those who want a tailored look and reliable fade resistance on a sunny patio or a sunroom that receives heavy daylight.

It is less suitable for people needing ultra-compact or thin cushions, and those wanting a replaceable insert-only option may prefer separate loose-fill pillows or a thinner pad for tight frames.

Pros & Cons

Pros

• Durable Sunbrella fabric resists fading and stands up to outdoor exposure.
• Generous 5 in CumuPlus fill provides long-lasting deep seating comfort and support.
• Rounded back and box edge styling create a neat, custom appearance on compatible chairs.
• Hidden zipper and US manufacturing add practical convenience and quality assurance.

Cons

• At 5 in thickness, it is not ideal for chairs that require slimmer cushions or limited seat depth.

Specifications

Product type	Rounded back seat cushion
Dimensions	19.5 in x 20 in x 5 in
Fabric	Sunbrella performance fabric (Melon)
Fill	5 in CumuPlus fill
Design	Rounded back with box edge styling
Features	Hidden zipper, indoor/outdoor use
Made	USA (made since 2004)

Our Verdict

The Cushion Source Rounded Back Seat Cushion is a solid pick for anyone needing a plush, weather-ready cushion with a tailored look. Its combination of Sunbrella fabric and 5 in CumuPlus fill makes it good value for outdoor and sunroom seating, delivering comfort and color retention over time.

Frequently Asked Questions

Will this cushion fit standard deep seating chairs?
The rounded back is designed for chairs about 19 in-21 in wide and 20 in-22 in deep, so it fits most deep seating and lounge chairs in that range.

Can the cover be removed for cleaning?
Yes, the cushion has a hidden zipper that allows the cover to be removed for cleaning or replacement.

Is the fabric suitable for outdoor use?
Yes, the Sunbrella performance fabric is fade resistant and suitable for outdoor patios and porches as well as indoor sunrooms.