SureGuard Split King Box Spring Encasement Pack — 100% Waterproof, Bed-Bug Proof, Hypoallergenic

SureGuard Split King Size Box Spring Encasement Pack is a two-piece, six-sided, zippered cover that provides 100% waterproof, bed bug–proof, and hypoallergenic protection for split king box springs.

Protecting the foundation of your bed matters as much as protecting the mattress. The SureGuard Split King Box Spring Encasement Pack consists of two matching zippered covers (39" x 80" each) designed to fit 8–11" deep box springs. Constructed from a soft, stretch-knit fabric that’s free from vinyl, PVC, phthalates, and fire retardants, these encasements create a secure barrier against liquids, dust, and common allergens while remaining quiet and comfortable under your fitted sheet.

How does this encasement keep liquids and stains away?

The encasement uses a fully waterproof, six-sided design to block spills and everyday moisture from reaching the box springs. Seams and fabric are engineered to prevent liquid penetration without adding bulk or noise.

• 100% waterproof backing over the entire box spring surface
• Six-sided coverage seals top, sides, and underside
• Machine-washable for easy stain removal
• 10-year quality guarantee for long-term performance

Can it actually stop bed bugs and dust mites?

Yes — the SureGuard encasement features a super-fine zipper with Invisi-Zip and SureSeal technology that creates a tight enclosure to keep bed bugs out and trap any existing pests inside for treatment. The tight knit fabric also reduces allergen transfer, helping to limit dust mites, pollen, and pet dander.

• Invisi-Zip and SureSeal zipper system prevents pest entry
• Fine-stitch construction blocks dust mites and pollen
• Works with SureGuard mattress encasements for full-bed protection
• Independently lab tested and GREENGUARD Gold certified

Will the cover feel noisy or change the look and fit of my bed?

The SureGuard fabric is a smooth, stretch-knit material that hugs the box spring like a glove and remains noiseless in normal use. Because it’s not vinyl, it keeps the bed foundation looking natural and the fitted sheet sits smoothly over the encasement.

• Soft, stretch-knit surface for a snug, silent fit
• Free from vinyl and other stiff plastics for natural drape
• Compatible with standard fitted sheets and bed skirts
• Designed for 8–11" deep box springs in split king configuration

How do I care for and install the split king covers?

Installation is straightforward: slide each encasement over its box spring, fully zip the Invisi-Zip closure, and use corner straps if needed to secure. Care is low effort—machine wash and tumble dry keep the covers fresh and functional without special cleaners.

• Two-piece split king format: 39" x 80" per cover
• Zippered closure for quick, secure installation
• Machine wash cold, tumble dry low for routine care
• Durable stitching and materials backed by a 10-year guarantee

Who is this for? The SureGuard Split King Size Box Spring Encasement Pack is intended for anyone seeking long-term protection for a split king bed foundation: homeowners with children or pets, allergy sufferers, people living in seasonal or multi-occupant housing, and anyone who wants waterproof, bed-bug resistant coverage without the stiffness of vinyl. If you need quiet, hypoallergenic protection that fits standard 8–11" deep box springs and pairs with a SureGuard mattress encasement for complete bed defense, this pack is a practical choice.

Features at a glance:

• 100% Waterproof six-sided protection
• Bed bug proof with Invisi-Zip and SureSeal zipper
• Hypoallergenic: blocks dust mites, mold, mildew, pollen, pet dander
• Soft, noiseless stretch-knit surface; free from vinyl/PVC/phthalates
• Split King two-piece set (39" x 80" each), fits 8–11" depth
• Machine washable, GREENGUARD Gold certified, 10-year quality guarantee