The 12 inches hybrid mattress King is made of the skin-friendly knitted fabric and the interior of the mattress uses multiple layers of supportive foam, providing excellent comfort. Individually Pocketed Coils work perfectly with Comfort Foam to ensure that your weight is evenly absorbed and distributed across the mattress, relieving pressure points and allowing you maximum comfort in any sleeping position. Hundreds of individual innerspring making up the support layer. Meanwhile, stronger coils are used around to enhance edge support, prevent sagging and ensure a longer-lasting service life. Therefore, your deep sleep will never be disturbed by your partner’s turning over or getting up. This promotes deeper, more restorative sleep. Sleptight Pillow top Mattress Queen meets Federal Flammability Standard 16 CFR 1633. The mattress fireproof layer is made of flame retardant viscose and low melts point PET fibers according to CFR1633 standard. The materials used in the mattress are eco-friendly, free of heavy metals and other bad substances. Sleptight King size mattress is an effective solution to help you fall asleep easily and stay asleep throughout the night which conforms to body perfectly, adapt to different sleeping positions. The Medium firm King size hybrid mattress compressed, rolled, vacuum sealed and get to your door in a moisture-proof bag. It is easy to set up, for a nice sleep experience, it is recommended to give the mattress 72 hours to air out and disperse that slight new mattress Sleptight Hybrid Mattress Experience the perfect sleep, sleep well The Euro Pillow top skin-friendly knitted fabric quilted on the top cover, which is highly breathable and comfortable, keeping the surface of hybrid mattress soft and airflow