The sprung mattress is very strong and not easy to deform. Standard fire barriers and supportive felt fabric can isolate the sprung to make a safer and excellent sleeping journey. With a fashionable plaid pattern and a white and grey color combination, the double mattress makes your room not so boring and builds a simple style bedroom. The bed-in-box mattress will inflate instantly after unboxing, and it will also keep expanding for about 24 hours so that the foam and spring can fully expand to a nice appearance. The memory foam mattress allows for complete relaxation by molding to your body, relieving key pressure points, and promoting airflow and breathability, the core is made of high-performance independently encased coils, designed to eliminate motion disturbance and keep you sleeping soundly. Back pain relief & motion isolation: The puffy mattress features a plush, soft surface that leaves you floating on a cloud, and the bottom offers medium queen firm mattress support. Perfectly shape your body. Say goodbye to back pain. Plus this memory foam mattress eliminates motion transfer and controls motion to prevent localized bounce, so you can sleep through your partner’s tossing and turning and wake up refreshed. The bed mattress is great for all sleeping positions. Wayfair Sleep Size: Kingsize (5')