BluestoneSunshields Full Lux, Multicoloured, One size

Is there any way to tighten the sides of visor? It doesn’t stay up and keep falling to cover my full face. I just want it to stay up so I can see.

Can this be rolled up for travel?

does this protect from blue light?

Has anyone actually tested this product once they got it (perhaps at the eye doctor's) to see if the UV protection is what it actually advertises?