Buy on Amazon : http://www.amazon.com/gp/product/B0064L8KYW?tag=scratchandsti-20

CowboyStudio Photography Photo Reversible Pop Out Background Panel (Blue and Green)

5 x 7 ft when extended
Folds down to a compact 30 X 30
Chromakey green on one side and blue on the reverse
Spring steel liner flexes out to hold the material tight
Zippered Case included