These are exactly what you think they are and I really really like them. They take a bit of wiggling to set up so they are fully extended and sturdy, but once there they are really really comfortable and have a variety of adjustments for the back. I just had rain the other night, I did notice rain pooled in one area so just keep an eye on that and swipe it off if needed- thats the only reason I gave it a 4 instead of 5. UPDATE these cushions have changed my life!