Split California King Mattress/Box Spring Encasement - Waterproof

In this review of the Split California King mattress and box spring encasement, the bottom line is simple: this cover is for anyone who wants a full, six-sided barrier against spills, dust and bed bugs while keeping the sleep surface soft and quiet. The single biggest reason to buy is its complete zippered enclosure with a Velcro zipper seal that prevents pests and liquids from reaching the mattress core, making it a practical choice for households with pets, kids or allergy concerns.

Key Features

• Six sided zippered encasement: Completely encloses the mattress and box spring so contaminants and pests cannot slip in around the edges.
• Waterproof lining: A polyurethane inner layer blocks liquids and moisture to protect the mattress from spills and accidents.
• Soft, noiseless fabric: Stretchable polyester surface provides a comfortable feel under sheets without crinkling sounds.
• Easy installation: Full zipper that wraps around three sides lets you slide the mattress in and zip shut without wrestling.
• Durable construction: Polyester exterior and polyurethane interior are machine washable for repeated cleaning and long service life.

Who It's For

This encasement is best suited to anyone using a Split California King mattress or matching box spring that is 8 to 11 in deep and who needs reliable protection against bed bugs, dust mites, pet hair and liquid accidents. It is a sensible pick for families with children, pet owners who worry about fur and accidents, and travelers who sometimes fold a mattress for transport.

Shoppers who prefer a lightweight, breathable topper for extra comfort rather than a full barrier, or those who need a thinner fitted protector rather than a six-sided enclosure, should look elsewhere; this product prioritizes complete protection over decorative bedding enhancements.

Pros & Cons

Pros

• Full six-sided zippered design seals out bed bugs and dust for complete protection.
• Waterproof polyurethane lining protects the mattress from spills and moisture.
• Soft, stretchable surface feels comfortable and remains noiseless under sheets.
• Machine washable and built to fit 8-11 in depths for lasting use.

Cons

• Some customers report mixed experiences with zipper durability, so care when zipping is recommended.
• Waterproof layers can feel less breathable than simple fabric protectors for users who prioritize airflow.

Specifications

Our Verdict

The Split California King encasement is a practical, value-focused choice for protecting mattresses and box springs from bed bugs, spills and dust. Its full zippered enclosure and waterproof lining make it especially well suited to homes with kids or pets, and the soft, noiseless surface preserves night comfort. It offers strong protection and easy maintenance for those who prioritize mattress longevity and hygiene.

Frequently Asked Questions

Will this fit a Split California King mattress?
Yes, the encasement is designed for Split California King sizes with mattress or box spring depths of 8 to 11 in.

Is the cover really waterproof?
Yes, a polyurethane inner lining blocks liquids and keeps moisture from reaching the mattress layers.

Can I wash this cover?
Yes, the cover is machine washable for routine cleaning and long-term use.