I have the same mattress. Almost never give it a second thought, which is what I really want in a mattress. Some reviews complain of a fishy smell but I didn't

I have the same mattress. Almost never give it a second thought, which is what I really want in a mattress. Some reviews complain of a fishy smell but I didn't encounter it with mine but there are enough reviews with that complain that I wonder if there are multiple manufacturing pipelines, one of which leads to a fishy smelling mattress.