SureGuard King Mattress Encasement — 13–16in Deep Waterproof, Bed-Bug Proof Six-Sided Zippered Cover, Hypoallergenic Cotton Terry

SureGuard King mattress encasement is a six-sided, zip-closed cover that fully seals a 13–16-inch deep king mattress to block liquids, dust, and bed bugs while preserving the mattress feel.

This premium encasement combines a cotton terry surface with a waterproof internal barrier and a heavy-duty, insect-proof zipper system. Independently lab-tested and GREENGUARD Gold certified, the cover aims to protect the mattress from everyday spills, allergens, dust, and pests without adding noise or a plastic feel. Machine washable and designed for long-term protection, it supports mattress longevity and cleaner sleep surfaces.

How does this encasement keep spills and stains from reaching the mattress?

The interior waterproof membrane forms a continuous barrier around the mattress, preventing liquids from soaking through fabric layers. Because it seals on all six sides and uses a reinforced zipper, fluids are contained on the outer surface for easy cleaning.

• 100% waterproof internal barrier blocks sweat, spills, and accidents
• Six-sided coverage protects top, bottom, and all edges
• Machine washable for routine maintenance and stain removal

What makes this encasement effective against bed bugs and dust?

The zipper system features a super-fine coil and proprietary sealing tech that prevents minute insects and dust from entering or exiting the mattress enclosure. When fully zipped, the encasement isolates the mattress surface so infestations and allergen accumulation are interrupted.

• Invisi-Zip and SureSeal zipper technology reduce gaps and entry points
• Complete enclosure design eliminates exposed seams where pests can penetrate
• Pairs with a box spring encasement for whole-bed pest protection

Will the encasement change the feel or temperature of my mattress?

The outer layer is 100% cotton terry that wicks moisture and maintains the mattress's original texture. The waterproof layer is engineered to be quiet and flexible, so the cover won’t create a crinkly surface or noticeably alter comfort.

• Cotton terry top preserves softness and breathability
• Moisture-wicking fibers help move sweat away from skin
• Free from vinyl, PVC, phthalates and common toxic additives

How do I care for and fit the encasement on a deep king mattress?

Fit is straightforward for mattresses 13 to 16 inches deep; the zippered design wraps fully around the mattress. Routine care is simple: machine wash and dry on settings recommended on the care label to keep the seal and fabric performing well.

• Designed for king size (78" x 80") with deep-pocket fit
• Zippered closure for easy installation and removal
• Machine washable and dryer-safe per label instructions

Who is this for? The SureGuard King 13–16 in. mattress encasement is ideal for households seeking comprehensive mattress protection: families with children, people managing spills or incontinence, allergy sufferers who want to reduce dust and dander, and anyone concerned about bed-bug exposure. It suits owners of deeper mattresses who want a quiet, cotton-feel finish with industry-standard pest and liquid protection.