Luckily, this has not been tested by a serious spill or accident of any kind... but we used this cover to seal the "mattress" section of a sofa, before putting on the new slipcover. Like those I've purchased previously in Queen size, this cover is light and not very bulky as an underneath layer. It has water-repellant properties without the plastic feel and rustle of old-fashioned covers. I am very satisfied with the quality of this brand for the money. It's a good investment to protect the expensive inner layer of any sitting or sleeping surface.
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