Memory foam : is a polyurethane based foam with open cells, meaning that air can pass into and out of tiny holes in the material. Before the development of memory foam overlays and mattresses, memory foam was the brainchild of the space program. Memory foam was originally developed as a material for the astronaut's flight chairs, in order to protect them from the powerful G-forces experienced at lift off. Memory foam is one of the most healthy sleep surfaces ever created, mainly because of it's incredible ability to reduce pressure points. A high quality memory foam mattress overlay has the ability to improve one's quality of sleep, alleviate back pain, improve circulation and may even help with some types of sleeping disorders like sleep apnea. Style:Tight top Knitted fabric with fireproof fiber 5.9 OYS (Ounces per Yard Squared) Non-woven quilting in the top 1.18" memory foam 50 Density 5.11" support foam 28 Density Corner label Vacuum packed and rolled for easy shipping Standard CFR 1633 Eco Friendly Fits any standard size bed for ultimate comfort, please sleep on the side with label Pocket spring : This type of spring system is generally considered to be one of the best type of sleeping system and is normally the most expensive type of finished innerspring mattress. Each spring unit is completely wrapped with 100gram non-woven fabrics per square meter enabling it to move freely and independently from the other springs. Each spring is free to respond to individual pressure in relation to the weight placed upon it, leading support in contouring the body shape, thus a pocket spring mattress can provide outstanding comfort levels If you are still wondering about how each spring is independent from other spring units, and why they can eliminate the disturbances between couples in a pocket spring mattress. Take an interesting experiment. Put a cup of water in a corner of the mattress, and then you sit on the opposite corner, imagine what will happen? Will the cup fall down and water spill? No. you can see the cup still stands there, which means your partner’s turning and movements can not disrupt you Style: Tight top 8.85 OYS (Ounces per Yard Squared) knitted fabric and fire barier 5.9 OYS (Ounces per Yard Squared) 1.18" foam quilting in the top 6.69" pocket spring 0.07" steel wire with foam encased 3.5" * 6.7", 32 density Corner label Standard CFR 1633 Eco Friendly Vacuum packed and rolled for easy shipping Coils are extremely durable for lasting comfort Fits any standard size bed for ultimate comfort, please sleep on the side with label More coils and more comfort. Higher coil count than factory installed mattresses Old technology (some companies still use this) has you sleeping on thin gauge continuous wire steel frames. New technology (like advanced pocketed coils) are the highest quality innerspring system. That’s why the custom pocketed coil Mattress has nearly 3 times more individually pocketed coils than most models These pocketed coils eliminate the continuous wire system. Continuous wire in the mattress (once again, old technology) can mean that you end up rolling toward each other or feeling the transfer of motion every time the other person moves This provides you with a mattress that forms to you, giving superior comfort and increased support around your body Note: We recommend that you allow up to 6 hours for the mattress to fully expand to its proper shape and size each Mattress in a Box comes complete with a 10 -year limited warranty. Product ID 103576640