Still searching for a super firm mattress? Finding these mattresses can sometimes be a challenge as the truly firm ones are often few and far between. If you are after such ultra firm bed, perhaps for therapeutically reasons, or perhaps you simply grew up sleeping on hard bed, Zzz Atelier Assured Firm may just be your perfect answer. This mattress is not for everyone. It has been designed specifically for those who seek very firm mattress. The core support layer of this mattress is made of triple tempered, extra thick coils for maximum support and stability. Its independent pocket spring design also ensures that shock and pressure is effectively absorbed and dispersed throughout the mattress. The tight top comfort layer is made of ultra high density foam to guarantee that comfort and firmness of this mattress remains unchanged for many years to come. This mattress is covered in comfortable Turkish organic cotton blend fabric that is soft on skin and highly effective in absorbing and dissipating body moist. Having passed the strict OEKO-TEX Standard 100 test, the quilting fabric also gives you the peace of mind of being away from substances harmful to human bodies. Quilt Turkish organic cotton knitted fabric Special side fabric designed for high breath-ability OEKO-TEX Standard 100 certified. Tested free of harmful substances Hypo-allergenic materials 99% dust mite resistant Upholstery Soft conforming foam Ultra high density foam Innerspring Innovative ZzzCoil pocket spring system. Triple tempered high carbon alloy steel, better elasticity then many of its counterparts, anti-rust, anti-corrosion and extremely durable. Extra thick wire diameter, ultra firm spring. Independent pocket spring which follows the contour of your body, maintaining spine in its natural posture, providing the deep down correct support. Motion isolation minimising partner disturbance. No flip technology, designed to eliminate the need to flip your mattress. Firmness Rating: 9 out of 10 Extra-firm design Mattress Height 23cm Size and Weight 183cm x 203cm, 40.0kg (King) 153cm x 203cm, 30.0kg (Queen) 138cm x 188cm, 25.0kg (Double) 107cm x 203cm, 21.1kg (King Single) 92cm x 188cm, 18.7kg (Single) Packaging and Unpacking High tech vacuum rolled packaging technology for easy handling and transport. Mattress will expand in minutes after unpacking and will be usable within 1 day. Please allow the mattress to expand for at least 24 hours before you sleep on it. Mattress may take up to 7 days to fully restore. Due to compressed packaging, the final 5% of manufactured height may take longer time in some cases. Packaging Content 1 x mattress (bed base not included)