Beistle 57831 PSI Body Silhouette, 30 by 5-Feet, Plastic, White/Black/Silver

What is it made out of?

Hi. i bought this product on amazon. i really like it but it's all wrinkled and i can't use it like this. any advice on how to take wrinkles out?

What are the dimensions of this item?

Pls. Snd. Full measurments, thanks...