Alternative to down rear cushions?

Long time no see everyone! I hope D is doing well and nice to see some updates.

My custom made velvet upholstered sofa is coming into the living/visiting room.

The 100% down rear cushions are a bit labourious with their fluffing needs, and I'm wondering what are good alternatives to look for.

Something that holds it shape better than down.

Any suggestions?

Fiber Fill for backs, slightly overfilled. That’s the industry standard. Your sofa maker can source those for you.

Thanks Duane and HNY! I am hearing that DuPont has a good one. Know it? https://www.fusionfillingcushion.co....allofil-fusion

That is a seat cushion core, back cushions of fiber fill are "loose" and structured differently.