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The Ella Jayne Allergy Free Encasement is a zippered, 100% polyester cover that seals a mattress or box spring against dust mites, allergens, spills and water. It fits mattresses 9 to 12 inches deep in Twin, Twin XL, Full, Queen and King, and is machine washable and tumble dryable. It carries Standard 100 by Oeko-Tex certification. The only new price found is $29.99 at eBay as of November 7, 2026, with no other new-store pricing to compare against.
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Lowest price we've seen: $24.99 on Nov 7 at Gilt.com. Tracked across 1 store since Nov 7.
Buyers are split, and the overall 2.4 out of 5 from 204 ratings leans negative. Complaints center on sizing and fit, the noisy, warm polyester feel, and zipper durability. Those who are satisfied value the waterproof, allergen-blocking protection for the money.