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The ProtectAll Healthy Sleep Mattress Encasement is a full-cover, zippered protector that seals the mattress on all six sides, in California King and white. It is aimed at allergy sufferers and households wanting to keep dust mites and spills out of the mattress rather than just off the top. At $19.99 at eBay as of November 7, 2026, it is a low-cost buy for a Cal King encasement, though only two stores carry it new, so the price can move with stock.
Availability unknownSold by stormdeals (99.8% positive, 1,400 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.
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Lowest price we've seen: $109.95 on Nov 7 at Slumberland Furniture Stores. Tracked across 2 stores since Nov 7.
Buyers rate it 4.7 out of 5 across 75 ratings, with most comments about fit and the sealed cover. Complaints are few and center on the effort of fitting and washing a full encasement.