Guardmax King Mattress Protector Zippered Encasement — Waterproof & Bed-Bug Proof, Soft Jersey Knit

Guardmax King Mattress Protector Zippered is a full mattress encasement that seals all six sides to block bed bugs, stops liquids with an internal waterproof barrier, and provides a soft jersey surface for quiet, comfortable sleep.

This zippered mattress cover combines a snug, fully sealed fit with a soft knit exterior so your mattress is protected from bed bugs, dust mites, spills, and everyday wear without feeling like plastic. Designed for a standard king mattress (78 x 80 inches) up to 12 inches deep, it stretches slightly to accommodate up to about 13 inches. The closure glides smoothly and tucks under a stitched guard flap, reducing gap points while keeping the fabric breathable and easy to launder.

How does this protector stop bed bugs and other pests?

The encasement completely surrounds the mattress, including the underside, and uses a zippered closure that wraps around three sides and tucks beneath a sewn flap. By eliminating unsealed seams and corner gaps, it prevents insects from entering or escaping the mattress core.

• Six-sided sealing covers top, bottom, and all sides.
• Nylon zipper follows three sides for a continuous barrier.
• Stitched guard flap hides the zipper pull to remove gaps.
• Durable seams resist tearing and maintain the barrier over time.

Will it feel comfortable and stay quiet at night?

The outer layer is a jersey-knit polyester that mimics the softness of a T-shirt, offering a smooth, quiet surface against sheets and skin. Unlike vinyl covers, the knit face reduces crinkling sounds and breathes better for comfort during sleep.

• Soft knitted polyester top for a non-plastic feel.
• Quiet fabric minimizes movement noise.
• Breathable knit helps regular laundering without shrinking.
• OEKO-TEX Standard 100 certified fabric against harmful substances.

How well does it protect against spills, stains, and allergens?

Beneath the knit exterior is a waterproof membrane that blocks liquids like sweat, accidental spills, and nighttime accidents from reaching the mattress. The tight fabric construction and sealed zipper also act as a physical barrier to trap dust mites and allergens inside the mattress, reducing airborne exposure around the bed.

• Internal waterproof layer repels liquids and prevents stains.
• Machine washable for easy cleanup—unzips like bedding for laundering.
• Tight knit plus sealed zipper reduces dust mite and allergen escape.
• Suitable for kids, guests, or anyone seeking extra mattress protection.

How do I know it will fit my mattress and how do I install it?

Measure your mattress width, length, and depth first—this Guardmax cover fits a king sized mattress 78" x 80" and 12" deep, with stretch to about 13". Installation is simple: slip the encasement over the mattress like a fitted sheet, align the zipper, and close it; tuck the zipper seam under the stitched flap for a smooth, gap-free finish.

• Designed for 78 x 80 inch king mattresses and 12" depth (stretches to ~13").
• Fits over mattress like a pillowcase, then zip fully closed.
• Zipper runs three sides for straightforward installation and removal.
• Washable fabric: machine wash warm, low tumble dry recommended.

Who is this for: The Guardmax King Mattress Protector Zippered is for anyone who wants comprehensive mattress protection without sacrificing comfort—homeowners concerned about bed bugs or allergens, parents protecting mattresses from accidents, and sleepers who prefer a soft, quiet cover over a loud vinyl option. It suits standard king mattresses up to 12 inches depth and is easy to install, remove, and launder for ongoing protection and peace of mind.