Premerio Silver Line 12" Pillow Top mattress is made with several layers for maximised comfort & support. Combed Satin Polyester Belgium netted fabric, 100% natural gel-infused Latex foam for resilient support & increased circulated function, convoluted form for reducing the pressure points, High Resilience 20 mm foam for firm support, High Resilience 25 mm foam for shock absorption, two 10mm Cotton Felt insulators for breathability, five zone wrapped High Tensile springs for hip & lumbar support and a 40 D high density base foam for grip & durability.