Kingnex Waterproof Split King Mattress Protector for Adjustable Beds

In this review of the Kingnex Waterproof Split King Mattress Protector, the bottom line is simple: it is best for sleepers who need thin, breathable protection for an adjustable split king mattress without changing the feel of the bed. The reviewer found the bamboo viscose jersey surface comfortable and cooler than many thick protectors, and the fitted design holds well on adjustable bases. For anyone who values a natural-feel cover with waterproof backing that won't interfere with mattress movement, this protector delivers the single biggest benefit: protection with minimal change to sleep comfort.

Key Features

• Material blend: 70% viscose made from bamboo and 30% cotton creates a soft, smooth surface that wicks moisture and feels cool to the touch.
• Waterproof protection: A TPU membrane coating on the reverse side repels liquids to keep the mattress clean and dry without bulky padding.
• Adjustable bed friendly: The fitted, stretchable design stays in place on adjustable bases and preserves the mattress's original feel by having no quilting or extra padding.
• Thin and breathable: The slim profile keeps the mattress sensation intact and allows airflow, helping sleepers who prefer a non-padded protector.
• Durable care: Machine washable in cold water and safe to tumble dry low for repeat use and easy maintenance.
• Split king sizing: Two fitted protectors are included, each 39 by 80 in, with deep pockets to fit mattresses up to 18 in thick.

Who It's For

This protector is ideal for people with split king adjustable beds who want waterproof protection without altering the feel of their mattress. Couples with adjustable bases will appreciate receiving two fitted covers in one package so each side can move independently and stay snug during adjustments. Those who sleep hot or sweat at night will benefit from the bamboo viscose surface that is cooler and moisture-wicking compared with heavier quilted protectors.

Shoppers who need full encasement for allergy control or extra quilted cushioning should look elsewhere, as this product focuses on a thin, fitted barrier rather than thick padding or full zippered encasement. Also, buyers desiring absolute silence should note there are mixed reports on noise level in customer feedback.

Pros & Cons

Pros

• Soft, cool-feeling bamboo viscose surface that improves comfort and wicks moisture.
• True waterproof TPU backing protects the mattress from spills and accidents.
• Designed for adjustable beds and split king setups; stays in place with deep pockets up to 18 in.
• Easy to care for by machine washing cold and tumble drying low for durability.

Cons

• Some users report mixed results on waterproof performance and occasional noise; experiences vary by use and laundering.
• Thin, unpadded design will not add cushioning or full encasement for severe allergy protection.

Specifications

Brand	Kingnex
Material	70% viscose from bamboo, 30% cotton
Waterproof	TPU membrane coating on reverse side
Pack contents	2 fitted mattress protectors (split king)
Each protector size	39 by 80 in
Fits mattress thickness	Up to 18 in deep pocket
Care	Machine wash cold, tumble dry low

Our Verdict

The Kingnex Split King Mattress Protector is a sensible choice for owners of adjustable split king beds who want reliable waterproofing without losing the mattress feel. Its soft bamboo viscose surface and fitted design make it good value for those who prioritize comfort, breathability, and easy care, though buyers seeking extra padding or rigid noise-free guarantees should consider alternatives.

Frequently Asked Questions

Does this protector work with adjustable beds?
The fitted, stretchable design is made to stay in place and function with adjustable mattresses, including split king setups.

Will it add bulk or change mattress feel?
No, the protector is intentionally thin with no quilting or padding so it preserves the original mattress feel.

How should I care for it?
Machine wash in cold water and tumble dry on low; buying two allows one to protect the mattress while the other is being washed.