Hi! Looking into getting a 6 inch mattress. Any brands you guys like? Seeing a lot of stuff on Amazon but when I read reviews they are awful and some are finding fiber glass in them

Hi, so for context I sleep on a bunk bed. The manual for the frame suggests a bed no greater than 6". The mattress I currently use is 8inches, which means the guard rails are very short and somewhat of a safety risk. I'm thinking of grabbing a cheap mattress, around 5-6 inches, but all of the mattresses and reviews for those mattresses have been for kids.

I'm 4'11", 120-130lbs, and have lower back problems due to a spinal birth defect. I need hard beds as I need lots of support for my hip/lower back area, and because I like my spine to feel straight/supported I sleep primarily on my stomach.

I'm just worried if 5 or 6 inches is too thin and if I'll end up feeling the slats of my bunk bed frame, especially if the mattress is something like memory foam (which I've previously slept great on)

I'm on a cheaper budget, and I'm thinking of going for 5 inches maybe because there's a firm 2inch topper I've been eyeing and in case the mattress isn't supportive enough I can add that (it'd be 7 inches total but only 1inch over the max instead of my current 2)