Waterproof Mattress Protector California King Size - Zippered

In this review the waterproof mattress protector for California king mattresses is judged on fit, protection and ease of use. It is aimed at people who want a full encasement rather than a simple pad; the single biggest reason to buy is the six-sided, zippered design that seals the mattress completely to guard against spills, bed bugs and dust mites. The cover fits a 72 in by 84 in mattress with a 15 in deep pocket and uses a stretchable knitted polyester face with TPU backing to provide a comfortable sleeping surface while keeping liquids from reaching the mattress.

Key Features

• Full Encasement: The zippered cover secures around the mattress 360 degrees so the entire mattress is protected from bed bugs, dust mites and surface spills.
• Exact California King Fit: Sized to fit 72 in by 84 in mattresses with a 15 in deep pocket so it slips on mattresses with up to 15 in depth without bunching.
• Comfortable Surface: Stretchable knitted polyester fabric provides a soft, breathable feel that moves with the mattress rather than feeling like a noisy plastic sheet.
• Waterproof Backing: High quality TPU backing on all sides resists leakage into the mattress to keep the interior dry from routine spills.
• Easy Care: The washable design allows machine washing and tumble drying for simple maintenance and routine cleaning.

Who It's For

This encasement is best for homeowners and renters who need comprehensive mattress protection and want a cover that seals completely around a California king mattress. It is particularly useful for those concerned about allergens, dust mites and bed bugs or who want protection from accidental spills without sacrificing a more fabric-like sleep surface.

It is less appropriate for shoppers seeking a thin, fitted waterproof pad to add above sheets or those who prefer quieter, fully cotton-only covers; anyone needing extra-heavy industrial waterproofing beyond routine spills should consider a product with reinforced seams or additional layering.

Pros & Cons

Pros

• Complete 360 degree zippered encasement offers thorough protection against bugs and allergens.
• Stretchable knitted polyester surface feels comfortable compared with vinyl-style protectors.
• TPU backing provides reliable resistance to most spills while keeping the mattress dry.

Cons

• Some users report mixed experiences with waterproofness and durability, so results can vary with heavy or repeated exposure to liquids.

Specifications

Product type	Mattress encasement
Size	California king (72 in x 84 in)
Depth	15 in deep pocket
Face fabric	Knitted polyester (stretchable)
Backing	High quality TPU waterproof backing
Closure	Zippered 360 degree cover
Care	Machine washable, tumble dry

Our Verdict

This California king zippered mattress encasement is a practical, good-value option for anyone wanting full six-sided protection without sacrificing surface comfort. It fits deep mattresses, blocks allergens and most spills via TPU backing, and is easy to clean, making it a solid choice for bedrooms where hygiene and bed bug protection are priorities.

Frequently Asked Questions

Will this fit a 15 in thick mattress?
Yes, the encasement is designed with a 15 in deep pocket to accommodate mattresses up to 15 in thick.

Is the cover machine washable?
Yes, the cover is machine washable and can be tumble dried for easy care.

Does the protector fully prevent leaks into the mattress?
The protector uses TPU backing to resist leakage and protect the mattress from routine spills, though user reports note mixed experiences with heavy or prolonged liquid exposure.