Compared across 2 stores. Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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The DMI waterproof mattress protector is a queen-size white cover made of polyester with a plastic waterproof backing. It is designed to keep spills, sweat and accidents off the mattress, and its plastic layer makes it the most protective kind of cover you can buy. That same plastic backing is the trade-off: it traps heat and can feel crinkly and noisy, so it suits guest beds, kids' beds, rentals and anyone protecting against incontinence better than sleepers who want a soft, breathable topper. Compared with quilted cotton or bamboo protectors, it blocks liquid completely but gives up comfort and quiet.
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Lowest price we've seen: $23.09 on Nov 10 at Staples. Tracked across 2 stores since Nov 10.
Owners generally treat this as a basic, effective waterproof barrier rather than a comfort layer. They report it does its job keeping spills and accidents off the mattress, but many mention noise and warmth from the plastic backing.
