What material to use?

Hello RIU, what material should i use to divide a room into two rooms. So i can have a veg and a flowering room? Currently i just use two seprate rooms but i'd like to just use one room. Any ideas on the right material?

How high are your ceilings?

what size room?

I used panda plastic. 2 layers so white on both sides and if you use the tarp zipper things from the hydro store. It will be light proof. Just have the zippers 1 inch apart.