... foam. 5.Durable pocket spring. Product details:Pocket spring mattress:High quality jacquard fabric quilted with one layer 300g/m2 ... the fire progression and energy output in a mattress or a mattress set when subjected to an ignition source approximate ... of fire-retardant mattresses, including tight top mattress, pillow top mattress and euro pillow top mattress, which are commonly exported to the ...