The sealy essentials support firm mattress is simple but effective in design it makes use of a zero deflection spring system to ensure a supportive sleeping surface as it absorbs body weight and movement to adapt to your sleeping positiona high quality woven damask cover and traditional tufted finish guarantee additional comfort for this no turn easy to care for mattress dimensionssingle w 90cm x l 190cmsmall double w 120cm x l 190cmdouble w 135cm x l 190cmkingsize w 150cm x l 200cmsupe