These are disposable mattress covers. They are easy to put on a mattress for 2 people. They don't last very long but are worth the price. They protected my mattress and box spring during a recent move. When I was done, I just tore them off. One side seems to be more reinforced (I assumed it should be the side resting on the ground. That's how we used it). It's impossible to seal though, so I used some tape and just folded the bag to make it tight.
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