Thanks, Roger. It's just one non-removable seat cushion on a love seat.
That white stuff is from a pillow inadvertently placed there.
There is a lot of lint and the texture is rougher, and sticky, of course, than the rest of the couch.
Thank you in advance for your help.
#1
Attachment 3549
#2
Attachment 3550
#3
Attachment 3551