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[Lala]

Hello I am new to Upholstry sewing so forgive me if this question seems silly.

The salon bottom seat cushions are done in 2 section, a front 8" section and a back 16.5" section. It is stiched as 1 large piece but divided (?) With 2 seperate entry points / zippers (1 for the front piece and 1 for the back section).
What is the reason/ intended purpose for this technique? Its seems challenging to say the least. I plan on replacing w/ new foam, new everything so I can do it any way I want really, but if there's a performance/comfort reason that stands out perhaps I should attempt to recreate or is there a better way?! Help! Not sure that made sense so pictures included. Thanks!

[Adam12]

It appears that both pieces of foam are the same thickness, in that case i think it's just a faux bolster and serves no real purpose. I would absolutely eliminate it and do a single piece. Foam is expensive, you can glue the foam together if it's in decent shape, it is common practice.

[Lala]

Awesome thank you! Curious about using the old foam. Does the foam have idk a shelf life? I mean does it have a point where it's just done and one wouldn't use it anymore? I mean short of it being compressed. When I touch it, it leaves behind a foam dandruff, little foam dust everywhere.