That I think is none of your business, nosy! LMAO ROFF. I think a sealy.
I have a Jameson solid foam core mattress... It's so comfy... It's almost as good as a memory foam mattress but a lot cheaper. You can jump on it while I'm putting on eyeliner and it doesn't make me mess it up.
We are using only the frame right now, but the mattress is a Sealy pillow top. It is really deep and nice, but hard to find sheets for.
I think a Sealy. But I have an amazing 5 inch thick memory foam pad on it. Ahhhh, it's like sleeping on a cloud.