Does it cover the bottom of the mattress?

Yes. It is a six-sided encasement, so it wraps the top, sides and bottom, with seams sealed to keep out bed bugs and dust mites.

Will it work on an adjustable base?

Yes. It is made to work on mattresses placed on an adjustable base, so the cover flexes with the mattress as it moves.

Is it noisy or hot to sleep on?

The OmniGuard Advance fabric is described as lightweight, quiet and breathable, so it is not the crinkly plastic feel of basic waterproof covers.

Does it protect against bed bugs?

It is designed to. The full encasement plus MiteTight seams seal out bed bugs and dust mites, which is why it is often used after a bed bug treatment.

It is a removable zippered cover, so it can be taken off the mattress for washing. Follow the care label, and a second cover lets you keep protection on while one is in the wash.

Does it fit a California King?

Yes, this version is sized for a California King mattress. Check your mattress depth before fitting, since a full encasement needs to close around the whole mattress.

Signature Total Encasement Mattress Price History: Lowest $159.99

Q: Where is the Signature Total Encasement Mattress Protector Cal King cheapest?

At Mattress Firm, for $159.99, as of our latest check.

Q: What do buyers say about the Signature Total Encasement Mattress Protector Cal King?

Buyers like: Waterproof full encasement protection; Helps with bed bugs and allergens; Breathable and quiet fabric.

What reviewers say

Owners report the encasement does what a full cover should: it keeps spills off the mattress, helps with bed bugs and allergens, and stays in place. The fabric is described as breathable and quiet rather than plasticky, and the antimicrobial treatment is noted for keeping it fresh.

What people mention

WaterproofingPraisedOwners say it keeps spills and accidents off the mattress on all sides.
AllergensPraisedBuyers report relief from dust mites and allergens with the sealed seams.
Fabric feelPraisedThe fabric is called breathable and quiet, not crinkly like plastic covers.
FitPraisedIt stays in place on the mattress without bunching or shifting.
FreshnessPraisedThe silver antimicrobial treatment is noted for keeping the cover from getting musty.

From Mattress Firm

Waterproof six-sided encasement covers the whole mattress
Helps guard against bed bugs, stains, dust mites and allergens
Silvadur antimicrobial silver treatment helps fight bacteria and odors
OmniGuard Advance Fabric is lightweight, quiet and breathable
MiteTight seams seal out bed bugs and dust mites
Works on mattresses placed on an adjustable base

Sizes: Twin, Twin XL, Full, Queen, King, Cal King, Split Cal King
Materials: OmniGuard® Advance Fabric
Fit: Total encasement fits over all six sides of the mattress; Cal King measures 76" x 80" x 15" and fits mattresses up to 17.5" deep
Sizing: Page FAQ states a maximum mattress height of 18"; the size chart lists per-size depth limits up to 17.5".
Care: Machine washable
Guarantee: 2 Year Limited Warranty on the protector itself; 10-year FirmCare mattress stain guarantee when purchased with a new mattress
Returns: Final Sale
Shipping: Free shipping; delivery to your front door, side door or garage with contactless delivery; no removal of your old mattress set
Packs: Add a second Twin XL mattress in cart to build a Split King set
In the box: Sleepy's Signature Total Encasement Mattress Protector

About the Signature Total Encasement Mattress Protector Cal King

This is a waterproof, six-sided mattress encasement in California King. It covers the entire mattress and helps guard against bed bugs, stains, dust mites and allergens. It also works on mattresses placed on an adjustable base.

The cover is made from OmniGuard Advance Fabric, which is lightweight, quiet and breathable. MiteTight seams seal out bed bugs and dust mites. A Silvadur antimicrobial silver treatment helps fight bacteria and odors.

The Cal King measures 76" x 80" x 15" and fits mattresses up to 17.5" deep. It is machine washable.