The Snow Peak Camp Couch initially started as 3 standalone rectangular sections with foldable joints, 4 individual cushions, and 2 backrest units for quickly packing during transportation. At that size, the whole setup should have no difficulty squeezing into the trunk of a car, even though the cushions may make it difficult to strap down onto your backpacks, so it might be better suited for car camping than anything where you will need to go on foot.
To form it into a couch, just snap on the 3 sections together, connect the backrests, and put down the padding appropriately. The backrest can be realigned in one of two perspectives, to help you select an upright posture or a somewhat more reclined placement. While only designed to sit two, it really does look large enough for 3 average-sized individuals to easily fit in, so it should lead to a fine option to camping seats and stools.