You slowly become a living spandex mattress by feeling your sides expand along with your lower crotch area as it smooths away the sides of your legs leaving only a flat spandex surface. Your legs stretch the thick spandex webbing as your limbs form an "X" as it erases and flattens any evidence that you were human except for your crotch bulge which you wonder why but you're too deep in pleasure of your second stage of your change. You start to wobble threatening to fall over and feel a surface of spandex arms of the zentai being that transformed you on your back and says, "Here, you need to lay down, you don't want to hurt yourself from your change." You comply by by being lowered down and you moan by his/its touch. He/it moves his/its arms away from your slow changing body when your whole back touches the cold floor as you wriggle and moan. Already your body is almost done changing into a mattress still smoothing out whatever human evidence you have, you feel your neck being absorbed by your shoulders and slowly engulfs your head leaving what used to be your face (like your bulge crotch) intact as you can only look up at the ceiling and moan and wriggle whatever body parts you have once more as it still continues to expand until it reaches to your wrists same thing happens for your inner legs until it stops at your ankles. You then feel your mass grow a bit as it became the same height of your feet as it becomes a rectangular shape.
"How do you feel Mr. Matt?" he/it asks as you reply to his question with a nod as best as you can and let out a moan of pleasure. You notice that you can still hear but muffled like your moaning voice. "That's good. Now, let's test out your size changing 'button.'" he then lowers down and place one hand beside your bulge and you feel another hand on your bulge and turns clockwise and press down and pulls away from your reforming bulge as you let out a loud muffled moan and feel your body expand again from a single to a double. He did the same process again until you reached the largest size of mattress as you enjoy that feeling of him/it playing with your bulge. He then turns it counter-clockwise and press your bulge again and you feel your body shrink back to a single size mattress and then back to your normal human size mattress. "You pass the size changing test. But, now let's test your memory foam reformation." he says and places both hands on one section of your spandex mattress body and you feel a mix of pleasure, and pressure and moan again. You then feel release on the section of where he/it presses and you feel that section of your body rise and reform back into a flat surface. He/it then says in confident, "You pass these simple tests. Now, let's get you to your new owner." The zentai being walked away from your mattress form as you moan out to him for more of that or lay on you. He/it then came back with two more zentai beings and a permanent marker as they flank you from your head and feet. You then feel a pair of spandex hands as they lift you up from waist level. You then wriggle your mitten hands and feet as you moan in pleasure of being touched as the zentai to your right wrote something on the side of your body which would be your name, and your owner's name and then is being carried out of the room and through the corridors and into a customer waiting room to be brought to your owner.
You hear muffled talking aside from the outside commotion from other customers and employees. You feel like the second voice is familiar to you but again, your hearing is muffled. You try to look down as best as you can to see who he/its talking to but is blocked by a zebra striped zentai drone carrying you and groan in disappointment and shook a little. You then started moving again as you were brought outside to your owner's car. You recognize the car that you're brought in....