8-inch supportive encased coil base provides individualized, contouring support, breathability, stability and durability to your mattress. (Coil Counts range from 544 - 884) Luxurious Layers: This mattress starts with 0.5 inch of supportive base foam under the encased coils to keep them in place, followed by an 8-inch supportive encased coil base, which provides individualized contouring support. Next is 0.5 inches of supportive transition foam and 1.5 inches of wave pattern convoluted gel foam. It’s all topped with 1.5 inches of foam and fiber plus stretch knit fabric top layer to form a quilted top for a comfortable sleep all night long. Find Your Perfect Match: Choose from 10-, 12-, and 14-inch depths and Twin (39” x 75”), Twin XL (39” x 80”), Full (54” x 75”), Queen (60” x 80”), King (78” x 80”), and California King (72” x 84”) sizes. CERTIPUR-US Certified Foams: Serenia Sleep mattress are made in the USA by American craftsmen using domestic and imported components. Spot clean only – do not remove the cover. Sweet Dreams Await You: Serenia Sleep's team of engineers crafts quality mattresses using cutting-edge foam technology to create extraordinary comfort for everyone. Our mattresses are assembled in the US and made with high-quality materials. You can sleep soundly on your Serenia Sleep mattress, knowing that we treated it as if it were going to our own home. Quilted Hybrid Bed Mattress - Gel-Infused, Deep Pocket, & Open Cell Foam Mattress with Breathable Cover for a Comfortable Sleep. Complete Comfort: Serenia Sleep Quilted Hybrid Mattresses include a mix of gel foam and 8-inch supportive encased coils. Your mattress will arrive compressed and roll packed. Simply unroll and let it expand to its proper height within 2 days (usually sooner). If there is a slight odor, it should dissipate in 24-48 hours.