On the other hand innerspring and latex are materials are generally more responsive and they can make it easier for the mattress to be a firm.
													
																	Top firm foam mattress. 
									
	
		
	
																	Before you buy a firm mattress it helps to know how mattresses are rated on a scale of firmness. 
																	This is due to the natural properties of the material. 
																	The 2 inch top layer is gel infused memory foam. 
																	What to know about firmness ratings. 
															
													
									
	
		
	
																	And another 1 inch copper gel infused foam layer. 
																	Some mattresses also come in medium on the firmness scale offering support as well as softness for pressure points. 
																	The best mattresses that won t sag for side back and stomach sleepers including memory foam innersprings and hybrids with options to buy in store or online in a box. 
																	The rest of the mattress consists of a 2 inch convoluted foam layer for airflow and cooling a 4 5 inch base foam that reduces motion transfer. 
															
													
									
	
		
	
																	This medium firm mattress conforms to your body s natural curves for proper spine alignment and sleep innovations says it s especially.