Sierra Sleep Advanced King Mattress Protector

The Sierra Sleep Advanced Protector is a fitted mattress protector built to guard your mattress from everyday spills, sweat, and dust mites without changing how it feels to sleep on. It pairs an advanced moisture-wicking cooling fabric with a quiet, waterproof barrier, so the surface stays comfortable and breathable while liquids are kept out.

Because the barrier is designed to be virtually silent and unnoticeable underneath your sheets, you get the reassurance of full protection without the stiff, plastic feel that older protectors are known for. The fabric resists stains and fluids and helps repel dust mites, making it a practical layer of defense for anyone dealing with allergies, kids, pets, or simply wanting their mattress to last longer.

• Advanced moisture-wicking, cool-to-the-touch fabric
• Quiet, waterproof barrier that repels liquids
• Helps resist stains and repel dust mites
• Fits mattresses up to 18 inches thick
• Compatible with hybrid, foam, and innerspring mattresses, including power bases
• Machine washable for easy care

This protector is backed by a 10 year warranty, giving you long-term peace of mind on top of the everyday protection it provides. It fits the mattress like a fitted sheet, stretching over the top and sides for a secure, snug fit that stays in place through normal use and regular washing.

Whether you are protecting a brand new mattress investment or extending the life of one you already own, this protector is an easy way to add a barrier against the spills, sweat, and everyday wear that mattresses face over years of use. It is a straightforward addition for any bedroom, from a guest room to a primary suite.

Available sizes: Twin, Twin XL, Full, Queen, King, and California King.

Series: Advanced Protector (Ashley model M30904).