This product was mentioned in 1 comments, with an average of 1.00 upvotes
It's actually meant to be a versatile bit of furniture made in three sections. You can lay them all flat to make a mat for laying on long-wise. You can prop up one section to have a back so you can sit back against something comfortable, and you can either have the "seat cushion" portion either two sections long, or double up for more butt support.
edit:: looks to be this thing