Windshields?

Just got my first rzr and I need to know what windshield to get. I don’t see the purpose of a flip up or down windshield. When would i ever fold it up? Im thinking just a regular windshield but, put me some knowledge on the issue por favor.

Im trying to keep the bugs outta my teeth and the dust out of my eyes. Will I need a back window too? And the roof, I assume?

Thats all the accessorizing I need to do right away but lemme know if i desperately need something I haven’t mentioned.

Thanks a bunch!