12" QUEEN HYBRID POCKET SPRING MATTRESS: Pairs luxurious comfort with optimal support so you can wake up each morning feeling refreshed and ready to take on the day LAYERS OF COMFORT: Enjoying a blissful night of sleep is effortless with the ultra-soft knitted fabric top and premium high-density foam over a pocket spring core that will power your sleep with conforming comfort every night ENSURES A SAFE SLEEP ENVIRONMENT: CertiPUR-US Certified foam is free from harmful substances, allowing you to rest peacefully and relaxed knowing the quality of your indoor air won't be compromised MATTRESS-IN-A-BOX CONVENIENCE: Ships compressed, rolled, and boxed, making it easy to transport and fit neatly into most bedframes; please allow 48 to 72 hours for your mattress to fully expand QUEEN SIZE MATTRESS: Measures 60"W x 80"D x 12"H and is compatible with trundle beds, platform beds, and adjustable bed frames so you can choose the perfect bed for your needs