Sierra Sleep Extra Cooling California King Mattress Protector

The Sierra Sleep Extra Cooling Protector wraps your California King mattress in a soft, breathable layer designed to keep the sleep surface cool, clean, and protected night after night. It is built with moisture wicking fabric that draws heat and moisture away from the body, so the top of the bed stays cool to the touch even on warm nights.

Underneath, a quiet waterproof barrier repels spills and everyday moisture without adding noise or changing the feel of your mattress. The protector also helps guard against dust mites, supporting a cleaner sleep surface for allergy sensitive sleepers. It is sized to fit mattresses up to 18 inches thick and works well over hybrid, memory foam, and innerspring constructions, and it remains compatible with adjustable power bases.

Why add a mattress protector

• Shields your mattress investment from spills, sweat, and everyday wear
• Cool to the touch fabric helps regulate temperature through the night
• Waterproof barrier works quietly, without crinkling or changing how the mattress feels
• Helps protect against dust mites for a cleaner sleep surface
• Fully machine washable for simple, ongoing care

Because the protector is machine washable, care is simple: wash it with a normal cycle and it is ready to go back on the bed. This protector is backed by a 10 year manufacturer warranty, so it is built to hold up to years of regular use.

This listing is sized for California King mattresses. Hot sleepers pairing it with a breathable hybrid or memory foam mattress will likely notice the cooling effect most, while side and back sleepers alike will appreciate that the protector adds no noticeable bulk or stiffness to the sleep surface. A protector like this is a simple, low cost way to extend the life of any mattress it covers.

Series: Extra Cooling Protector (Ashley model M31005)