Serweet 8 Inch Foam and Spring Mattress , CertiPUR-US Certified Foams , Mattress-in-a-Box. The firmness, and comfort of the mattress are great. It has great support and it's not too hard or too soft, adjusts to your body rather quickly and makes going to bed the highlight of the day. Also, the set up was very simple and easy. 

Features

• COOL, SUPPORTIVE, LUXURIOUS - With the unmatched support of steel pocket springs and conforming softness of foams, this cooling  hybrid is the one you'll depend on for cool, luxurious, and pressure-relieving sleep
• DURABLE COMFORT - When soft, yet durable foam layers combine with steel innersprings, a match made in mattress heaven happens, resulting in a supportive spring mattress with the right hint of conforming softness.
• CERTIPUR US CERTIFIED - Highest quality foam is CertiPUR US Certified for durability, performance, and content
• support up to 500 lbs
• EXPERTLY PACKAGED :Serweet mattress is efficiently compressed into a box that's shipped right to your door, simply unbox, unroll and the mattress does the rest, expanding to its original shape within 72 hours. 
• Warranty:100 hassle-free night trial, 100-Days Money Back and 10 year limited warranty included. Please contact us for any question.

Dimensions: 

Twin:      39" W x 75"L x  8"H     Box Dimension:11"*11"*44.1"        N.W.:45.96 lbs       G.W.:48.82 lbs

Full :       54"W x 75"Lx  8"H      Box Dimension:15"*15"*31.9"        N.W.:50.27 lbs       G.W.:53.57 lbs

Queen :  60"W x 80"L x  8"H      Box Dimension:15"*15"*34.6"       N.W.:59.41 lbs       G.W.:63.16 lbs

Avaliable in 8"/10"/12" thickness mattress in below Product Collection.