The silentnight miracoil 7 luxury supercomfort super king size mattress features zoned continuous springs which provide targeted comfort support and pressure relief for all shapes and sizes as well as firmness for your hips softness for your shoulders and support for your lower back this super kingsize mattress offers medium firm support and is upholstered with a modern micro quilted cover in a luxourious soft knit fabric with anti allergy and anti microbial properties it makes a good matt