Reinforced pocket spring provides edge support, resists sagging & rolling off. No matter when you sleep alone or next to a partner, the Deluxe Support Plus mattress is the perfect blend of comfort and motion separation for undisturbed sleep A foolproof combination of individually wrapped i - Coil pocket spring innerspring and supportive foams topped with a durable, quilted cover result in an undisturbed, restorative sleep that will have you daydreaming about bedtime. All Zinus foam mattresses are of highest quality and Certi - PUR US certified. This high-quality foam has been tested for durability, performance, and content. - Coils providing customised support while minimising motion transfer for uninterrupted sleep. This Zinus deluxe support plus pocket spring mattress combines the best features you can find on our best selling pocket spring mattress, plus now with reinforced pocket springs around the border that prevents sagging as you sit on the edge of the bed. And with its euro top design and innovative pocketed i - Coils, this all-around favourite is what dreams are made of. To top it off, precisely chosen layers of conforming comfort foam and supportive high-density foam add up to a feel that's not too firm and not too soft, but somewhere perfectly in between. - PUR-US Certified, i