Guardmax Jersey Knitted Twin XL Zippered Mattress Encasement

In this review the Guardmax Jersey Knitted Twin XL Zippered Mattress Encasement is judged as a protective yet comfortable option for anyone who needs full mattress protection without the crinkly feel of vinyl covers. The single biggest reason to buy is the combination of a soft, jersey knitted exterior and a TPU laminate that delivers 100% waterproof protection while remaining quiet. For people with allergies, kids, pets, or who want bed bug protection, this encasement aims to seal the mattress completely and still feel like a normal fitted cover.

Key Features

• Size & Depth: Fits Twin XL mattresses 39 x 80 x 10 and stretches to fit up to 11 in depth, so it covers most standard and slightly taller twin XL mattresses.
• Jersey Knitted Fabric: The polyester jersey knit creates a soft, breathable surface that feels more like bedding than a plastic protector.
• TPU Laminate: The internal TPU membrane prevents liquid penetration, protecting the mattress from spills and accidents.
• Zippered Encasement: A full nylon coil zipper seals the mattress to block bed bugs and allergens from entering or exiting once zipped closed.
• Hypoallergenic Protection: The cover shields against dust, dander, and dirt to help reduce nighttime allergy symptoms.
• Easy Care: The encasement slips on and off with minimal fuss and can be handwashed or run through a quick machine wash.

Who It's For

This encasement is best for sleepers who want comprehensive mattress protection combined with a comfortable, quiet surface. It works well for allergy sufferers, parents protecting mattresses from children or pets, and anyone seeking bed bug proofing with a durable zipper system.

People who prefer a cooling, high-airflow specialty protector or those who need a very tight fitted sheet appearance for an extra-deep hybrid mattress beyond 11 in should look elsewhere. Also, if an ultra-thick waterproof pad is desired for added cushioning, this encasement is primarily a barrier rather than a padding layer.

Pros & Cons

Pros

• Soft, jersey knitted surface that is quiet and comfortable compared with vinyl protectors.
• Complete encasement with a durable nylon coil zipper that provides bed bug and allergen protection.
• Waterproof TPU membrane that stops liquid from penetrating to the mattress core.
• Easy to install and remove for washing while still fitting mattresses up to 11 in deep.

Cons

• Some users report mixed impressions about waterproofing under heavy saturation, so expect normal limits of any TPU membrane.
• Two people may be needed to fit or remove the cover on heavier mattresses due to the full encasement design.

Specifications

Our Verdict

The Guardmax Jersey Knitted Twin XL Zippered Encasement is a practical buy for anyone needing full mattress protection without the scratchy feel of older vinyl covers. It combines softness, a reliable zipper seal for bed bug defense, and a waterproof TPU layer, making it good value for parents, allergy sufferers, and pet owners who want long-term protection.

Frequently Asked Questions

Will this fit a mattress thicker than 10 in?
The cover stretches to fit mattresses up to 11 in deep but may be tight on mattresses thicker than that.

Is the surface noisy like plastic protectors?
No, the jersey knitted polyester surface is quiet and soft compared with traditional plastic encasements.

Can it be washed in a machine?
Yes, it can be handwashed or put in a quick machine wash for easy cleaning.