I slept on my first extra firm mattress and as a stomach sleeper, I love it — why I’d buy it in the Black Friday sales

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The Plank Firm is the firmest mattress I've ever tested. Here's my experience sleeping on it for two weeks, and why it's worth buying this Black Friday.

I slept on my first extra firm mattress and as a stomach sleeper, I love it — why I’d buy it in the Black Friday sales : Read more