Pure Green Natural Latex Mattress Topper - Firm - 2 Inch - Twin XL Size (GOLS Certified Organic)

Can I return the topper if I don't like it?

Have read that latex needs a full cover to prevent deterioration. Does this come with such a cover?

Can this topper be placed on top of an existing mattress? I see several who mentioned having to remove a layer from their existing mattress??

I'm 6 ft & 230 lbs side sleeper . Do you think this would be firm enough for me. I need a very firm topper to avoid sinking, advise if this isn't